Merge "Revert "Minimum viable TimeZoneDetectorService""
diff --git a/Android.bp b/Android.bp
index 9ad0dd7..8e17479 100644
--- a/Android.bp
+++ b/Android.bp
@@ -832,6 +832,7 @@
         "core/java/android/net/ProxyInfoParcelable.aidl",
         "core/java/android/net/RouteInfoParcelable.aidl",
         "core/java/android/net/StaticIpConfigurationParcelable.aidl",
+        "core/java/android/net/TcpKeepalivePacketDataParcelable.aidl",
         "core/java/android/net/dhcp/DhcpServingParamsParcel.aidl",
         "core/java/android/net/dhcp/IDhcpServer.aidl",
         "core/java/android/net/dhcp/IDhcpServerCallbacks.aidl",
diff --git a/api/current.txt b/api/current.txt
index 4363b6e..d787070 100755
--- a/api/current.txt
+++ b/api/current.txt
@@ -27167,7 +27167,7 @@
     field public static final String EXTRA_NETWORK = "android.net.extra.NETWORK";
     field @Deprecated public static final String EXTRA_NETWORK_INFO = "networkInfo";
     field public static final String EXTRA_NETWORK_REQUEST = "android.net.extra.NETWORK_REQUEST";
-    field public static final String EXTRA_NETWORK_TYPE = "networkType";
+    field @Deprecated public static final String EXTRA_NETWORK_TYPE = "networkType";
     field public static final String EXTRA_NO_CONNECTIVITY = "noConnectivity";
     field @Deprecated public static final String EXTRA_OTHER_NETWORK_INFO = "otherNetwork";
     field public static final String EXTRA_REASON = "reason";
@@ -40410,6 +40410,7 @@
     method public static java.io.FileDescriptor accept(java.io.FileDescriptor, java.net.InetSocketAddress) throws android.system.ErrnoException, java.net.SocketException;
     method public static boolean access(String, int) throws android.system.ErrnoException;
     method public static void bind(java.io.FileDescriptor, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
+    method public static void bind(java.io.FileDescriptor, java.net.SocketAddress) throws android.system.ErrnoException, java.net.SocketException;
     method public static void chmod(String, int) throws android.system.ErrnoException;
     method public static void chown(String, int, int) throws android.system.ErrnoException;
     method public static void close(java.io.FileDescriptor) throws android.system.ErrnoException;
@@ -40478,6 +40479,7 @@
     method public static long sendfile(java.io.FileDescriptor, java.io.FileDescriptor, android.system.Int64Ref, long) throws android.system.ErrnoException;
     method public static int sendto(java.io.FileDescriptor, java.nio.ByteBuffer, int, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
     method public static int sendto(java.io.FileDescriptor, byte[], int, int, int, java.net.InetAddress, int) throws android.system.ErrnoException, java.net.SocketException;
+    method public static int sendto(java.io.FileDescriptor, byte[], int, int, int, java.net.SocketAddress) throws android.system.ErrnoException, java.net.SocketException;
     method @Deprecated public static void setegid(int) throws android.system.ErrnoException;
     method public static void setenv(String, String, boolean) throws android.system.ErrnoException;
     method @Deprecated public static void seteuid(int) throws android.system.ErrnoException;
@@ -41285,6 +41287,15 @@
     method public abstract void onScreenCall(@NonNull android.telecom.Call.Details);
     method public final void provideCallIdentification(@NonNull android.telecom.Call.Details, @NonNull android.telecom.CallIdentification);
     method public final void respondToCall(@NonNull android.telecom.Call.Details, @NonNull android.telecom.CallScreeningService.CallResponse);
+    field public static final String ACTION_NUISANCE_CALL_STATUS_CHANGED = "android.telecom.action.NUISANCE_CALL_STATUS_CHANGED";
+    field public static final int CALL_DURATION_LONG = 4; // 0x4
+    field public static final int CALL_DURATION_MEDIUM = 3; // 0x3
+    field public static final int CALL_DURATION_SHORT = 2; // 0x2
+    field public static final int CALL_DURATION_VERY_SHORT = 1; // 0x1
+    field public static final String EXTRA_CALL_DURATION = "android.telecom.extra.CALL_DURATION";
+    field public static final String EXTRA_CALL_HANDLE = "android.telecom.extra.CALL_HANDLE";
+    field public static final String EXTRA_CALL_TYPE = "android.telecom.extra.CALL_TYPE";
+    field public static final String EXTRA_IS_NUISANCE = "android.telecom.extra.IS_NUISANCE";
     field public static final String SERVICE_INTERFACE = "android.telecom.CallScreeningService";
   }
 
@@ -41863,12 +41874,12 @@
 
   public class TelecomManager {
     method public void acceptHandover(android.net.Uri, int, android.telecom.PhoneAccountHandle);
-    method @RequiresPermission(anyOf={android.Manifest.permission.ANSWER_PHONE_CALLS, android.Manifest.permission.MODIFY_PHONE_STATE}) public void acceptRingingCall();
-    method @RequiresPermission(anyOf={android.Manifest.permission.ANSWER_PHONE_CALLS, android.Manifest.permission.MODIFY_PHONE_STATE}) public void acceptRingingCall(int);
+    method @Deprecated @RequiresPermission(anyOf={android.Manifest.permission.ANSWER_PHONE_CALLS, android.Manifest.permission.MODIFY_PHONE_STATE}) public void acceptRingingCall();
+    method @Deprecated @RequiresPermission(anyOf={android.Manifest.permission.ANSWER_PHONE_CALLS, android.Manifest.permission.MODIFY_PHONE_STATE}) public void acceptRingingCall(int);
     method public void addNewIncomingCall(android.telecom.PhoneAccountHandle, android.os.Bundle);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void cancelMissedCallsNotification();
     method public android.content.Intent createManageBlockedNumbersIntent();
-    method @RequiresPermission(android.Manifest.permission.ANSWER_PHONE_CALLS) public boolean endCall();
+    method @Deprecated @RequiresPermission(android.Manifest.permission.ANSWER_PHONE_CALLS) public boolean endCall();
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public android.net.Uri getAdnUriForPhoneAccount(android.telecom.PhoneAccountHandle);
     method @RequiresPermission(android.Manifest.permission.READ_PHONE_STATE) public java.util.List<android.telecom.PhoneAccountHandle> getCallCapablePhoneAccounts();
     method public String getDefaultDialerPackage();
@@ -41890,6 +41901,7 @@
     method @RequiresPermission(android.Manifest.permission.READ_PHONE_STATE) public boolean isVoiceMailNumber(android.telecom.PhoneAccountHandle, String);
     method @RequiresPermission(anyOf={android.Manifest.permission.CALL_PHONE, android.Manifest.permission.MANAGE_OWN_CALLS}) public void placeCall(android.net.Uri, android.os.Bundle);
     method public void registerPhoneAccount(android.telecom.PhoneAccount);
+    method @RequiresPermission(android.Manifest.permission.READ_PHONE_STATE) public void reportNuisanceCallStatus(@NonNull android.net.Uri, boolean);
     method @RequiresPermission(android.Manifest.permission.READ_PHONE_STATE) public void showInCallScreen(boolean);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void silenceRinger();
     method public void unregisterPhoneAccount(android.telecom.PhoneAccountHandle);
@@ -42083,7 +42095,7 @@
   }
 
   public final class AvailableNetworkInfo implements android.os.Parcelable {
-    ctor public AvailableNetworkInfo(int, int, java.util.ArrayList<java.lang.String>);
+    ctor public AvailableNetworkInfo(int, int, java.util.List<java.lang.String>);
     method public int describeContents();
     method public java.util.List<java.lang.String> getMccMncs();
     method public int getPriority();
@@ -43038,7 +43050,7 @@
     method public int getNetworkType();
     method public int getPhoneCount();
     method public int getPhoneType();
-    method public int getPreferredOpportunisticDataSubscription();
+    method @RequiresPermission(anyOf={"android.permission.READ_PRIVILEGED_PHONE_STATE", android.Manifest.permission.READ_PHONE_STATE}) public int getPreferredOpportunisticDataSubscription();
     method @RequiresPermission(android.Manifest.permission.READ_PHONE_STATE) public android.telephony.ServiceState getServiceState();
     method @Nullable public android.telephony.SignalStrength getSignalStrength();
     method public int getSimCarrierId();
@@ -43074,6 +43086,7 @@
     method @RequiresPermission(anyOf={android.Manifest.permission.ACCESS_NETWORK_STATE, android.Manifest.permission.READ_PHONE_STATE}) public boolean isDataRoamingEnabled();
     method public boolean isHearingAidCompatibilitySupported();
     method public boolean isNetworkRoaming();
+    method public boolean isRttSupported();
     method public boolean isSmsCapable();
     method @Deprecated public boolean isTtyModeSupported();
     method public boolean isVoiceCapable();
@@ -43605,9 +43618,9 @@
   }
 
   public interface GroupCallCallback {
-    method public void onBroadcastSignalStrengthUpdated(@IntRange(from=0xffffffff, to=4) int);
-    method public void onError(int, @Nullable String);
-    method public void onGroupCallStateChanged(int, int);
+    method public default void onBroadcastSignalStrengthUpdated(@IntRange(from=0xffffffff, to=4) int);
+    method public default void onError(int, @Nullable String);
+    method public default void onGroupCallStateChanged(int, int);
     field public static final int SIGNAL_STRENGTH_UNAVAILABLE = -1; // 0xffffffff
   }
 
@@ -43665,10 +43678,10 @@
   }
 
   public interface MbmsGroupCallSessionCallback {
-    method public void onAvailableSaisUpdated(@NonNull java.util.List<java.lang.Integer>, @NonNull java.util.List<java.util.List<java.lang.Integer>>);
-    method public void onError(int, @Nullable String);
-    method public void onMiddlewareReady();
-    method public void onServiceInterfaceAvailable(@NonNull String, int);
+    method public default void onAvailableSaisUpdated(@NonNull java.util.List<java.lang.Integer>, @NonNull java.util.List<java.util.List<java.lang.Integer>>);
+    method public default void onError(int, @Nullable String);
+    method public default void onMiddlewareReady();
+    method public default void onServiceInterfaceAvailable(@NonNull String, int);
   }
 
   public class MbmsStreamingSessionCallback {
diff --git a/api/system-current.txt b/api/system-current.txt
index 954e82c..954d383 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -3069,6 +3069,7 @@
 
   public class ConnectivityManager {
     method @RequiresPermission(android.Manifest.permission.PACKET_KEEPALIVE_OFFLOAD) public android.net.SocketKeepalive createNattKeepalive(@NonNull android.net.Network, @NonNull java.io.FileDescriptor, @NonNull java.net.InetAddress, @NonNull java.net.InetAddress, @NonNull java.util.concurrent.Executor, @NonNull android.net.SocketKeepalive.Callback);
+    method @RequiresPermission(android.Manifest.permission.PACKET_KEEPALIVE_OFFLOAD) public android.net.SocketKeepalive createSocketKeepalive(@NonNull android.net.Network, @NonNull java.net.Socket, @NonNull java.util.concurrent.Executor, @NonNull android.net.SocketKeepalive.Callback);
     method public boolean getAvoidBadWifi();
     method @RequiresPermission(android.Manifest.permission.LOCAL_MAC_ADDRESS) public String getCaptivePortalServerUrl();
     method @RequiresPermission(android.Manifest.permission.TETHER_PRIVILEGED) public void getLatestTetheringEntitlementValue(int, boolean, @NonNull android.net.ConnectivityManager.TetheringEntitlementValueListener, @Nullable android.os.Handler);
@@ -6320,7 +6321,6 @@
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public boolean getEmergencyCallbackMode();
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public String getIsimDomain();
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public String getIsimIst();
-    method @RequiresPermission("android.permission.MODIFY_PHONE_STATE") public int getPreferredNetworkType(int);
     method @RequiresPermission(anyOf={android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE, android.Manifest.permission.READ_PHONE_STATE}) public int getRadioPowerState();
     method public int getSimApplicationState();
     method public int getSimCardState();
@@ -6366,6 +6366,7 @@
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public boolean switchSlots(int[]);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void toggleRadioOnOff();
     method public void updateServiceLocation();
+    field @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public static final String ACTION_DEBUG_EVENT = "android.telephony.action.DEBUG_EVENT";
     field public static final String ACTION_SIM_APPLICATION_STATE_CHANGED = "android.telephony.action.SIM_APPLICATION_STATE_CHANGED";
     field public static final String ACTION_SIM_CARD_STATE_CHANGED = "android.telephony.action.SIM_CARD_STATE_CHANGED";
     field public static final String ACTION_SIM_SLOT_STATUS_CHANGED = "android.telephony.action.SIM_SLOT_STATUS_CHANGED";
@@ -6373,33 +6374,12 @@
     field public static final int CARRIER_PRIVILEGE_STATUS_HAS_ACCESS = 1; // 0x1
     field public static final int CARRIER_PRIVILEGE_STATUS_NO_ACCESS = 0; // 0x0
     field public static final int CARRIER_PRIVILEGE_STATUS_RULES_NOT_LOADED = -1; // 0xffffffff
+    field public static final String EXTRA_DEBUG_EVENT_DESCRIPTION = "android.telephony.extra.DEBUG_EVENT_DESCRIPTION";
+    field public static final String EXTRA_DEBUG_EVENT_ID = "android.telephony.extra.DEBUG_EVENT_ID";
     field public static final String EXTRA_SIM_STATE = "android.telephony.extra.SIM_STATE";
     field public static final String EXTRA_VISUAL_VOICEMAIL_ENABLED_BY_USER_BOOL = "android.telephony.extra.VISUAL_VOICEMAIL_ENABLED_BY_USER_BOOL";
     field public static final String EXTRA_VOICEMAIL_SCRAMBLED_PIN_STRING = "android.telephony.extra.VOICEMAIL_SCRAMBLED_PIN_STRING";
     field public static final long MAX_NUMBER_VERIFICATION_TIMEOUT_MILLIS = 60000L; // 0xea60L
-    field public static final int NETWORK_MODE_CDMA_EVDO = 4; // 0x4
-    field public static final int NETWORK_MODE_CDMA_NO_EVDO = 5; // 0x5
-    field public static final int NETWORK_MODE_EVDO_NO_CDMA = 6; // 0x6
-    field public static final int NETWORK_MODE_GLOBAL = 7; // 0x7
-    field public static final int NETWORK_MODE_GSM_ONLY = 1; // 0x1
-    field public static final int NETWORK_MODE_GSM_UMTS = 3; // 0x3
-    field public static final int NETWORK_MODE_LTE_CDMA_EVDO = 8; // 0x8
-    field public static final int NETWORK_MODE_LTE_CDMA_EVDO_GSM_WCDMA = 10; // 0xa
-    field public static final int NETWORK_MODE_LTE_GSM_WCDMA = 9; // 0x9
-    field public static final int NETWORK_MODE_LTE_ONLY = 11; // 0xb
-    field public static final int NETWORK_MODE_LTE_TDSCDMA = 15; // 0xf
-    field public static final int NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA = 22; // 0x16
-    field public static final int NETWORK_MODE_LTE_TDSCDMA_GSM = 17; // 0x11
-    field public static final int NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA = 20; // 0x14
-    field public static final int NETWORK_MODE_LTE_TDSCDMA_WCDMA = 19; // 0x13
-    field public static final int NETWORK_MODE_LTE_WCDMA = 12; // 0xc
-    field public static final int NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA = 21; // 0x15
-    field public static final int NETWORK_MODE_TDSCDMA_GSM = 16; // 0x10
-    field public static final int NETWORK_MODE_TDSCDMA_GSM_WCDMA = 18; // 0x12
-    field public static final int NETWORK_MODE_TDSCDMA_ONLY = 13; // 0xd
-    field public static final int NETWORK_MODE_TDSCDMA_WCDMA = 14; // 0xe
-    field public static final int NETWORK_MODE_WCDMA_ONLY = 2; // 0x2
-    field public static final int NETWORK_MODE_WCDMA_PREF = 0; // 0x0
     field public static final int NETWORK_TYPE_BITMASK_1xRTT = 128; // 0x80
     field public static final int NETWORK_TYPE_BITMASK_CDMA = 16; // 0x10
     field public static final int NETWORK_TYPE_BITMASK_EDGE = 4; // 0x4
diff --git a/api/test-current.txt b/api/test-current.txt
index e4f999b..34c8f6e 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -1477,7 +1477,6 @@
 
   public class TelephonyManager {
     method public int getCarrierIdListVersion();
-    method public boolean isRttSupported();
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void refreshUiccProfile();
     method public void setCarrierTestOverride(String, String, String, String, String, String, String);
     field public static final int UNKNOWN_CARRIER_ID_LIST_VERSION = -1; // 0xffffffff
diff --git a/core/java/android/ddm/DdmHandleHello.java b/core/java/android/ddm/DdmHandleHello.java
index b2288fc..87568e8 100644
--- a/core/java/android/ddm/DdmHandleHello.java
+++ b/core/java/android/ddm/DdmHandleHello.java
@@ -16,13 +16,15 @@
 
 package android.ddm;
 
+import android.os.Debug;
+import android.os.UserHandle;
+import android.util.Log;
+
+import dalvik.system.VMRuntime;
+
 import org.apache.harmony.dalvik.ddmc.Chunk;
 import org.apache.harmony.dalvik.ddmc.ChunkHandler;
 import org.apache.harmony.dalvik.ddmc.DdmServer;
-import android.util.Log;
-import android.os.Debug;
-import android.os.UserHandle;
-import dalvik.system.VMRuntime;
 
 import java.nio.ByteBuffer;
 
@@ -35,6 +37,8 @@
     public static final int CHUNK_WAIT = type("WAIT");
     public static final int CHUNK_FEAT = type("FEAT");
 
+    private static final int CLIENT_PROTOCOL_VERSION = 1;
+
     private static DdmHandleHello mInstance = new DdmHandleHello();
 
     private static final String[] FRAMEWORK_FEATURES = new String[] {
@@ -145,7 +149,7 @@
                             + vmFlags.length() * 2
                             + 1);
         out.order(ChunkHandler.CHUNK_ORDER);
-        out.putInt(DdmServer.CLIENT_PROTOCOL_VERSION);
+        out.putInt(CLIENT_PROTOCOL_VERSION);
         out.putInt(android.os.Process.myPid());
         out.putInt(vmIdent.length());
         out.putInt(appName.length());
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
index 1240ef8..03530c4 100644
--- a/core/java/android/net/ConnectivityManager.java
+++ b/core/java/android/net/ConnectivityManager.java
@@ -68,6 +68,7 @@
 import java.lang.annotation.RetentionPolicy;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
+import java.net.Socket;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -177,10 +178,10 @@
      * The lookup key for a {@link NetworkInfo} object. Retrieve with
      * {@link android.content.Intent#getParcelableExtra(String)}.
      *
-     * @deprecated Since {@link NetworkInfo} can vary based on UID, applications
-     *             should always obtain network information through
-     *             {@link #getActiveNetworkInfo()}.
-     * @see #EXTRA_NETWORK_TYPE
+     * @deprecated The {@link NetworkInfo} object is deprecated, as many of its properties
+     *             can't accurately represent modern network characteristics.
+     *             Please obtain information about networks from the {@link NetworkCapabilities}
+     *             or {@link LinkProperties} objects instead.
      */
     @Deprecated
     public static final String EXTRA_NETWORK_INFO = "networkInfo";
@@ -189,7 +190,11 @@
      * Network type which triggered a {@link #CONNECTIVITY_ACTION} broadcast.
      *
      * @see android.content.Intent#getIntExtra(String, int)
+     * @deprecated The network type is not rich enough to represent the characteristics
+     *             of modern networks. Please use {@link NetworkCapabilities} instead,
+     *             in particular the transports.
      */
+    @Deprecated
     public static final String EXTRA_NETWORK_TYPE = "networkType";
 
     /**
@@ -1243,9 +1248,13 @@
      *        is no current default network.
      *
      * {@hide}
+     * @deprecated please use {@link #getLinkProperties(Network)} on the return
+     *             value of {@link #getActiveNetwork()} instead. In particular,
+     *             this method will return non-null LinkProperties even if the
+     *             app is blocked by policy from using this network.
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
-    @UnsupportedAppUsage
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 109783091)
     public LinkProperties getActiveLinkProperties() {
         try {
             return mService.getActiveLinkProperties();
@@ -1816,7 +1825,7 @@
                 @Override
                 public void handleMessage(Message message) {
                     switch (message.what) {
-                        case NetworkAgent.EVENT_PACKET_KEEPALIVE:
+                        case NetworkAgent.EVENT_SOCKET_KEEPALIVE:
                             int error = message.arg2;
                             try {
                                 if (error == SUCCESS) {
@@ -1881,7 +1890,8 @@
      * @param callback A {@link SocketKeepalive.Callback}. Used for notifications about keepalive
      *        changes. Must be extended by applications that use this API.
      *
-     * @return A {@link SocketKeepalive} object, which can be used to control this keepalive object.
+     * @return A {@link SocketKeepalive} object that can be used to control the keepalive on the
+     *         given socket.
      **/
     public SocketKeepalive createSocketKeepalive(@NonNull Network network,
             @NonNull UdpEncapsulationSocket socket,
@@ -1910,6 +1920,8 @@
      * @param callback A {@link SocketKeepalive.Callback}. Used for notifications about keepalive
      *        changes. Must be extended by applications that use this API.
      *
+     * @return A {@link SocketKeepalive} object that can be used to control the keepalive on the
+     *         given socket.
      * @hide
      */
     @SystemApi
@@ -1925,6 +1937,34 @@
     }
 
     /**
+     * Request that keepalives be started on a TCP socket.
+     * The socket must be established.
+     *
+     * @param network The {@link Network} the socket is on.
+     * @param socket The socket that needs to be kept alive.
+     * @param executor The executor on which callback will be invoked. This implementation assumes
+     *                 the provided {@link Executor} runs the callbacks in sequence with no
+     *                 concurrency. Failing this, no guarantee of correctness can be made. It is
+     *                 the responsibility of the caller to ensure the executor provides this
+     *                 guarantee. A simple way of creating such an executor is with the standard
+     *                 tool {@code Executors.newSingleThreadExecutor}.
+     * @param callback A {@link SocketKeepalive.Callback}. Used for notifications about keepalive
+     *        changes. Must be extended by applications that use this API.
+     *
+     * @return A {@link SocketKeepalive} object that can be used to control the keepalive on the
+     *         given socket.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.PACKET_KEEPALIVE_OFFLOAD)
+    public SocketKeepalive createSocketKeepalive(@NonNull Network network,
+            @NonNull Socket socket,
+            @NonNull Executor executor,
+            @NonNull Callback callback) {
+        return new TcpSocketKeepalive(mService, network, socket, executor, callback);
+    }
+
+    /**
      * Ensure that a network route exists to deliver traffic to the specified
      * host via the specified network interface. An attempt to add a route that
      * already exists is ignored, but treated as successful.
diff --git a/core/java/android/net/IConnectivityManager.aidl b/core/java/android/net/IConnectivityManager.aidl
index 78fafeb..c926351 100644
--- a/core/java/android/net/IConnectivityManager.aidl
+++ b/core/java/android/net/IConnectivityManager.aidl
@@ -188,6 +188,9 @@
             int intervalSeconds, in Messenger messenger, in IBinder binder, String srcAddr,
             String dstAddr);
 
+    void startTcpKeepalive(in Network network, in FileDescriptor fd, int intervalSeconds,
+            in Messenger messenger, in IBinder binder);
+
     void stopKeepalive(in Network network, int slot);
 
     String getCaptivePortalServerUrl();
diff --git a/core/java/android/net/KeepalivePacketData.java b/core/java/android/net/KeepalivePacketData.java
index 7436ad0..18726f7 100644
--- a/core/java/android/net/KeepalivePacketData.java
+++ b/core/java/android/net/KeepalivePacketData.java
@@ -16,22 +16,20 @@
 
 package android.net;
 
-import static android.net.ConnectivityManager.PacketKeepalive.*;
+import static android.net.SocketKeepalive.ERROR_INVALID_IP_ADDRESS;
+import static android.net.SocketKeepalive.ERROR_INVALID_PORT;
 
+import android.net.SocketKeepalive.InvalidPacketException;
 import android.net.util.IpUtils;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.system.OsConstants;
 import android.util.Log;
 
-import java.net.Inet4Address;
 import java.net.InetAddress;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
 
 /**
  * Represents the actual packets that are sent by the
- * {@link android.net.ConnectivityManager.PacketKeepalive} API.
+ * {@link android.net.SocketKeepalive} API.
  *
  * @hide
  */
@@ -53,8 +51,8 @@
     /** Packet data. A raw byte string of packet data, not including the link-layer header. */
     private final byte[] mPacket;
 
-    private static final int IPV4_HEADER_LENGTH = 20;
-    private static final int UDP_HEADER_LENGTH = 8;
+    protected static final int IPV4_HEADER_LENGTH = 20;
+    protected static final int UDP_HEADER_LENGTH = 8;
 
     // This should only be constructed via static factory methods, such as
     // nattKeepalivePacket
@@ -80,53 +78,10 @@
         }
     }
 
-    public static class InvalidPacketException extends Exception {
-        public final int error;
-        public InvalidPacketException(int error) {
-            this.error = error;
-        }
-    }
-
     public byte[] getPacket() {
         return mPacket.clone();
     }
 
-    public static KeepalivePacketData nattKeepalivePacket(
-            InetAddress srcAddress, int srcPort, InetAddress dstAddress, int dstPort)
-            throws InvalidPacketException {
-
-        if (!(srcAddress instanceof Inet4Address) || !(dstAddress instanceof Inet4Address)) {
-            throw new InvalidPacketException(ERROR_INVALID_IP_ADDRESS);
-        }
-
-        if (dstPort != NATT_PORT) {
-            throw new InvalidPacketException(ERROR_INVALID_PORT);
-        }
-
-        int length = IPV4_HEADER_LENGTH + UDP_HEADER_LENGTH + 1;
-        ByteBuffer buf = ByteBuffer.allocate(length);
-        buf.order(ByteOrder.BIG_ENDIAN);
-        buf.putShort((short) 0x4500);             // IP version and TOS
-        buf.putShort((short) length);
-        buf.putInt(0);                            // ID, flags, offset
-        buf.put((byte) 64);                       // TTL
-        buf.put((byte) OsConstants.IPPROTO_UDP);
-        int ipChecksumOffset = buf.position();
-        buf.putShort((short) 0);                  // IP checksum
-        buf.put(srcAddress.getAddress());
-        buf.put(dstAddress.getAddress());
-        buf.putShort((short) srcPort);
-        buf.putShort((short) dstPort);
-        buf.putShort((short) (length - 20));      // UDP length
-        int udpChecksumOffset = buf.position();
-        buf.putShort((short) 0);                  // UDP checksum
-        buf.put((byte) 0xff);                     // NAT-T keepalive
-        buf.putShort(ipChecksumOffset, IpUtils.ipChecksum(buf, 0));
-        buf.putShort(udpChecksumOffset, IpUtils.udpChecksum(buf, 0, IPV4_HEADER_LENGTH));
-
-        return new KeepalivePacketData(srcAddress, srcPort, dstAddress, dstPort, buf.array());
-    }
-
     /* Parcelable Implementation */
     public int describeContents() {
         return 0;
@@ -141,7 +96,7 @@
         out.writeByteArray(mPacket);
     }
 
-    private KeepalivePacketData(Parcel in) {
+    protected KeepalivePacketData(Parcel in) {
         srcAddress = NetworkUtils.numericToInetAddress(in.readString());
         dstAddress = NetworkUtils.numericToInetAddress(in.readString());
         srcPort = in.readInt();
diff --git a/core/java/android/net/NattKeepalivePacketData.java b/core/java/android/net/NattKeepalivePacketData.java
new file mode 100644
index 0000000..bdb246f
--- /dev/null
+++ b/core/java/android/net/NattKeepalivePacketData.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.net.SocketKeepalive.ERROR_INVALID_IP_ADDRESS;
+import static android.net.SocketKeepalive.ERROR_INVALID_PORT;
+
+import android.net.SocketKeepalive.InvalidPacketException;
+import android.net.util.IpUtils;
+import android.system.OsConstants;
+
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+/** @hide */
+public final class NattKeepalivePacketData extends KeepalivePacketData {
+
+    // This should only be constructed via static factory methods, such as
+    // nattKeepalivePacket
+    private NattKeepalivePacketData(InetAddress srcAddress, int srcPort,
+            InetAddress dstAddress, int dstPort, byte[] data) throws
+            InvalidPacketException {
+        super(srcAddress, srcPort, dstAddress, dstPort, data);
+    }
+
+    /**
+     * Factory method to create Nat-T keepalive packet structure.
+     */
+    public static NattKeepalivePacketData nattKeepalivePacket(
+            InetAddress srcAddress, int srcPort, InetAddress dstAddress, int dstPort)
+            throws InvalidPacketException {
+
+        if (!(srcAddress instanceof Inet4Address) || !(dstAddress instanceof Inet4Address)) {
+            throw new InvalidPacketException(ERROR_INVALID_IP_ADDRESS);
+        }
+
+        if (dstPort != NattSocketKeepalive.NATT_PORT) {
+            throw new InvalidPacketException(ERROR_INVALID_PORT);
+        }
+
+        int length = IPV4_HEADER_LENGTH + UDP_HEADER_LENGTH + 1;
+        ByteBuffer buf = ByteBuffer.allocate(length);
+        buf.order(ByteOrder.BIG_ENDIAN);
+        buf.putShort((short) 0x4500);             // IP version and TOS
+        buf.putShort((short) length);
+        buf.putInt(0);                            // ID, flags, offset
+        buf.put((byte) 64);                       // TTL
+        buf.put((byte) OsConstants.IPPROTO_UDP);
+        int ipChecksumOffset = buf.position();
+        buf.putShort((short) 0);                  // IP checksum
+        buf.put(srcAddress.getAddress());
+        buf.put(dstAddress.getAddress());
+        buf.putShort((short) srcPort);
+        buf.putShort((short) dstPort);
+        buf.putShort((short) (length - 20));      // UDP length
+        int udpChecksumOffset = buf.position();
+        buf.putShort((short) 0);                  // UDP checksum
+        buf.put((byte) 0xff);                     // NAT-T keepalive
+        buf.putShort(ipChecksumOffset, IpUtils.ipChecksum(buf, 0));
+        buf.putShort(udpChecksumOffset, IpUtils.udpChecksum(buf, 0, IPV4_HEADER_LENGTH));
+
+        return new NattKeepalivePacketData(srcAddress, srcPort, dstAddress, dstPort, buf.array());
+    }
+}
diff --git a/core/java/android/net/NetworkAgent.java b/core/java/android/net/NetworkAgent.java
index 99bfc14..7bef690 100644
--- a/core/java/android/net/NetworkAgent.java
+++ b/core/java/android/net/NetworkAgent.java
@@ -18,7 +18,6 @@
 
 import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
-import android.net.ConnectivityManager.PacketKeepalive;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
@@ -154,7 +153,7 @@
      *
      * Also used internally by ConnectivityService / KeepaliveTracker, with different semantics.
      */
-    public static final int CMD_START_PACKET_KEEPALIVE = BASE + 11;
+    public static final int CMD_START_SOCKET_KEEPALIVE = BASE + 11;
 
     /**
      * Requests that the specified keepalive packet be stopped.
@@ -163,20 +162,40 @@
      *
      * Also used internally by ConnectivityService / KeepaliveTracker, with different semantics.
      */
-    public static final int CMD_STOP_PACKET_KEEPALIVE = BASE + 12;
+    public static final int CMD_STOP_SOCKET_KEEPALIVE = BASE + 12;
 
     /**
-     * Sent by the NetworkAgent to ConnectivityService to provide status on a packet keepalive
-     * request. This may either be the reply to a CMD_START_PACKET_KEEPALIVE, or an asynchronous
+     * Sent by the NetworkAgent to ConnectivityService to provide status on a socket keepalive
+     * request. This may either be the reply to a CMD_START_SOCKET_KEEPALIVE, or an asynchronous
      * error notification.
      *
-     * This is also sent by KeepaliveTracker to the app's ConnectivityManager.PacketKeepalive to
-     * so that the app's PacketKeepaliveCallback methods can be called.
+     * This is also sent by KeepaliveTracker to the app's {@link SocketKeepalive},
+     * so that the app's {@link SocketKeepalive.Callback} methods can be called.
      *
      * arg1 = slot number of the keepalive
      * arg2 = error code
      */
-    public static final int EVENT_PACKET_KEEPALIVE = BASE + 13;
+    public static final int EVENT_SOCKET_KEEPALIVE = BASE + 13;
+
+    // TODO: move the above 2 constants down so they are in order once merge conflicts are resolved
+    /**
+     * Sent by the KeepaliveTracker to NetworkAgent to add a packet filter.
+     *
+     * For TCP keepalive offloads, keepalive packets are sent by the firmware. However, because the
+     * remote site will send ACK packets in response to the keepalive packets, the firmware also
+     * needs to be configured to properly filter the ACKs to prevent the system from waking up.
+     * This does not happen with UDP, so this message is TCP-specific.
+     * arg1 = slot number of the keepalive to filter for.
+     * obj = the keepalive packet to send repeatedly.
+     */
+    public static final int CMD_ADD_KEEPALIVE_PACKET_FILTER = BASE + 16;
+
+    /**
+     * Sent by the KeepaliveTracker to NetworkAgent to remove a packet filter. See
+     * {@link #CMD_ADD_KEEPALIVE_PACKET_FILTER}.
+     * arg1 = slot number of the keepalive packet filter to remove.
+     */
+    public static final int CMD_REMOVE_KEEPALIVE_PACKET_FILTER = BASE + 17;
 
     /**
      * Sent by ConnectivityService to inform this network transport of signal strength thresholds
@@ -288,12 +307,12 @@
                 saveAcceptUnvalidated(msg.arg1 != 0);
                 break;
             }
-            case CMD_START_PACKET_KEEPALIVE: {
-                startPacketKeepalive(msg);
+            case CMD_START_SOCKET_KEEPALIVE: {
+                startSocketKeepalive(msg);
                 break;
             }
-            case CMD_STOP_PACKET_KEEPALIVE: {
-                stopPacketKeepalive(msg);
+            case CMD_STOP_SOCKET_KEEPALIVE: {
+                stopSocketKeepalive(msg);
                 break;
             }
 
@@ -313,6 +332,14 @@
                 preventAutomaticReconnect();
                 break;
             }
+            case CMD_ADD_KEEPALIVE_PACKET_FILTER: {
+                addKeepalivePacketFilter(msg);
+                break;
+            }
+            case CMD_REMOVE_KEEPALIVE_PACKET_FILTER: {
+                removeKeepalivePacketFilter(msg);
+                break;
+            }
         }
     }
 
@@ -443,22 +470,40 @@
     /**
      * Requests that the network hardware send the specified packet at the specified interval.
      */
-    protected void startPacketKeepalive(Message msg) {
-        onPacketKeepaliveEvent(msg.arg1, PacketKeepalive.ERROR_HARDWARE_UNSUPPORTED);
+    protected void startSocketKeepalive(Message msg) {
+        onSocketKeepaliveEvent(msg.arg1, SocketKeepalive.ERROR_HARDWARE_UNSUPPORTED);
     }
 
     /**
-     * Requests that the network hardware send the specified packet at the specified interval.
+     * Requests that the network hardware stops sending keepalive packets.
      */
-    protected void stopPacketKeepalive(Message msg) {
-        onPacketKeepaliveEvent(msg.arg1, PacketKeepalive.ERROR_HARDWARE_UNSUPPORTED);
+    protected void stopSocketKeepalive(Message msg) {
+        onSocketKeepaliveEvent(msg.arg1, SocketKeepalive.ERROR_HARDWARE_UNSUPPORTED);
     }
 
     /**
-     * Called by the network when a packet keepalive event occurs.
+     * Called by the network when a socket keepalive event occurs.
      */
-    public void onPacketKeepaliveEvent(int slot, int reason) {
-        queueOrSendMessage(EVENT_PACKET_KEEPALIVE, slot, reason);
+    public void onSocketKeepaliveEvent(int slot, int reason) {
+        queueOrSendMessage(EVENT_SOCKET_KEEPALIVE, slot, reason);
+    }
+
+    /**
+     * Called by ConnectivityService to add specific packet filter to network hardware to block
+     * ACKs matching the sent keepalive packets. Implementations that support this feature must
+     * override this method.
+     */
+    protected void addKeepalivePacketFilter(Message msg) {
+        onSocketKeepaliveEvent(msg.arg1, SocketKeepalive.ERROR_HARDWARE_UNSUPPORTED);
+    }
+
+    /**
+     * Called by ConnectivityService to remove a packet filter installed with
+     * {@link #addKeepalivePacketFilter(Message)}. Implementations that support this feature
+     * must override this method.
+     */
+    protected void removeKeepalivePacketFilter(Message msg) {
+        onSocketKeepaliveEvent(msg.arg1, SocketKeepalive.ERROR_HARDWARE_UNSUPPORTED);
     }
 
     /**
diff --git a/core/java/android/net/NetworkUtils.java b/core/java/android/net/NetworkUtils.java
index 07668a9..0ae29b1 100644
--- a/core/java/android/net/NetworkUtils.java
+++ b/core/java/android/net/NetworkUtils.java
@@ -71,6 +71,18 @@
             throws SocketException;
 
     /**
+     * Attaches a socket filter that drops all of incoming packets.
+     * @param fd the socket's {@link FileDescriptor}.
+     */
+    public static native void attachDropAllBPFFilter(FileDescriptor fd) throws SocketException;
+
+    /**
+     * Detaches a socket filter.
+     * @param fd the socket's {@link FileDescriptor}.
+     */
+    public static native void detachBPFFilter(FileDescriptor fd) throws SocketException;
+
+    /**
      * Configures a socket for receiving ICMPv6 router solicitations and sending advertisements.
      * @param fd the socket's {@link FileDescriptor}.
      * @param ifIndex the interface index.
@@ -170,6 +182,16 @@
     private static native void addArpEntry(byte[] ethAddr, byte[] netAddr, String ifname,
             FileDescriptor fd) throws IOException;
 
+
+    /**
+     * Get the tcp repair window associated with the {@code fd}.
+     *
+     * @param fd the tcp socket's {@link FileDescriptor}.
+     * @return a {@link TcpRepairWindow} object indicates tcp window size.
+     */
+    public static native TcpRepairWindow getTcpRepairWindow(FileDescriptor fd)
+            throws ErrnoException;
+
     /**
      * @see Inet4AddressUtils#intToInet4AddressHTL(int)
      * @deprecated Use either {@link Inet4AddressUtils#intToInet4AddressHTH(int)}
diff --git a/core/java/android/net/SocketKeepalive.java b/core/java/android/net/SocketKeepalive.java
index 97d50f4..07728be 100644
--- a/core/java/android/net/SocketKeepalive.java
+++ b/core/java/android/net/SocketKeepalive.java
@@ -19,6 +19,7 @@
 import android.annotation.IntDef;
 import android.annotation.IntRange;
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Looper;
@@ -109,13 +110,53 @@
      **/
     public static final int MAX_INTERVAL_SEC = 3600;
 
+    /**
+     * An exception that embarks an error code.
+     * @hide
+     */
+    public static class ErrorCodeException extends Exception {
+        public final int error;
+        public ErrorCodeException(final int error, final Throwable e) {
+            super(e);
+            this.error = error;
+        }
+        public ErrorCodeException(final int error) {
+            this.error = error;
+        }
+    }
+
+    /**
+     * This socket is invalid.
+     * See the error code for details, and the optional cause.
+     * @hide
+     */
+    public static class InvalidSocketException extends ErrorCodeException {
+        public InvalidSocketException(final int error, final Throwable e) {
+            super(error, e);
+        }
+        public InvalidSocketException(final int error) {
+            super(error);
+        }
+    }
+
+    /**
+     * This packet is invalid.
+     * See the error code for details.
+     * @hide
+     */
+    public static class InvalidPacketException extends ErrorCodeException {
+        public InvalidPacketException(final int error) {
+            super(error);
+        }
+    }
+
     @NonNull final IConnectivityManager mService;
     @NonNull final Network mNetwork;
     @NonNull private final Executor mExecutor;
     @NonNull private final SocketKeepalive.Callback mCallback;
     @NonNull private final Looper mLooper;
     @NonNull final Messenger mMessenger;
-    @NonNull Integer mSlot;
+    @Nullable Integer mSlot;
 
     SocketKeepalive(@NonNull IConnectivityManager service, @NonNull Network network,
             @NonNull Executor executor, @NonNull Callback callback) {
@@ -135,7 +176,7 @@
             @Override
             public void handleMessage(Message message) {
                 switch (message.what) {
-                    case NetworkAgent.EVENT_PACKET_KEEPALIVE:
+                    case NetworkAgent.EVENT_SOCKET_KEEPALIVE:
                         final int status = message.arg2;
                         try {
                             if (status == SUCCESS) {
diff --git a/core/java/android/net/TcpKeepalivePacketData.java b/core/java/android/net/TcpKeepalivePacketData.java
new file mode 100644
index 0000000..f07dfb6
--- /dev/null
+++ b/core/java/android/net/TcpKeepalivePacketData.java
@@ -0,0 +1,234 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import static android.net.SocketKeepalive.ERROR_INVALID_IP_ADDRESS;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.SocketKeepalive.InvalidPacketException;
+import android.net.util.IpUtils;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.system.OsConstants;
+
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Objects;
+
+/**
+ * Represents the actual tcp keep alive packets which will be used for hardware offload.
+ * @hide
+ */
+public class TcpKeepalivePacketData extends KeepalivePacketData implements Parcelable {
+    private static final String TAG = "TcpKeepalivePacketData";
+
+     /** TCP sequence number. */
+    public final int tcpSeq;
+
+    /** TCP ACK number. */
+    public final int tcpAck;
+
+    /** TCP RCV window. */
+    public final int tcpWnd;
+
+    /** TCP RCV window scale. */
+    public final int tcpWndScale;
+
+    private static final int IPV4_HEADER_LENGTH = 20;
+    private static final int IPV6_HEADER_LENGTH = 40;
+    private static final int TCP_HEADER_LENGTH = 20;
+
+    // This should only be constructed via static factory methods, such as
+    // tcpKeepalivePacket.
+    private TcpKeepalivePacketData(TcpSocketInfo tcpDetails, byte[] data)
+            throws InvalidPacketException {
+        super(tcpDetails.srcAddress, tcpDetails.srcPort, tcpDetails.dstAddress,
+                tcpDetails.dstPort, data);
+        tcpSeq = tcpDetails.seq;
+        tcpAck = tcpDetails.ack;
+        // In the packet, the window is shifted right by the window scale.
+        tcpWnd = tcpDetails.rcvWnd;
+        tcpWndScale = tcpDetails.rcvWndScale;
+    }
+
+    /**
+     * Factory method to create tcp keepalive packet structure.
+     */
+    public static TcpKeepalivePacketData tcpKeepalivePacket(
+            TcpSocketInfo tcpDetails) throws InvalidPacketException {
+        final byte[] packet;
+        if ((tcpDetails.srcAddress instanceof Inet4Address)
+                && (tcpDetails.dstAddress instanceof Inet4Address)) {
+            packet = buildV4Packet(tcpDetails);
+        } else {
+            // TODO: support ipv6
+            throw new InvalidPacketException(ERROR_INVALID_IP_ADDRESS);
+        }
+
+        return new TcpKeepalivePacketData(tcpDetails, packet);
+    }
+
+    /**
+     * Build ipv4 tcp keepalive packet, not including the link-layer header.
+     */
+    // TODO : if this code is ever moved to the network stack, factorize constants with the ones
+    // over there.
+    private static byte[] buildV4Packet(TcpSocketInfo tcpDetails) {
+        final int length = IPV4_HEADER_LENGTH + TCP_HEADER_LENGTH;
+        ByteBuffer buf = ByteBuffer.allocate(length);
+        buf.order(ByteOrder.BIG_ENDIAN);
+        // IP version and TOS. TODO : fetch this from getsockopt(SOL_IP, IP_TOS)
+        buf.putShort((short) 0x4500);
+        buf.putShort((short) length);
+        buf.putInt(0x4000);                         // ID, flags=DF, offset
+        // TODO : fetch TTL from getsockopt(SOL_IP, IP_TTL)
+        buf.put((byte) 64);
+        buf.put((byte) OsConstants.IPPROTO_TCP);
+        final int ipChecksumOffset = buf.position();
+        buf.putShort((short) 0);                    // IP checksum
+        buf.put(tcpDetails.srcAddress.getAddress());
+        buf.put(tcpDetails.dstAddress.getAddress());
+        buf.putShort((short) tcpDetails.srcPort);
+        buf.putShort((short) tcpDetails.dstPort);
+        buf.putInt(tcpDetails.seq);                 // Sequence Number
+        buf.putInt(tcpDetails.ack);                 // ACK
+        buf.putShort((short) 0x5010);               // TCP length=5, flags=ACK
+        buf.putShort((short) (tcpDetails.rcvWnd >> tcpDetails.rcvWndScale));   // Window size
+        final int tcpChecksumOffset = buf.position();
+        buf.putShort((short) 0);                    // TCP checksum
+        // URG is not set therefore the urgent pointer is not included
+        buf.putShort(ipChecksumOffset, IpUtils.ipChecksum(buf, 0));
+        buf.putShort(tcpChecksumOffset, IpUtils.tcpChecksum(
+                buf, 0, IPV4_HEADER_LENGTH, TCP_HEADER_LENGTH));
+
+        return buf.array();
+    }
+
+    // TODO: add buildV6Packet.
+
+    /** Represents tcp/ip information. */
+    // TODO: Replace TcpSocketInfo with TcpKeepalivePacketDataParcelable.
+    public static class TcpSocketInfo {
+        public final InetAddress srcAddress;
+        public final InetAddress dstAddress;
+        public final int srcPort;
+        public final int dstPort;
+        public final int seq;
+        public final int ack;
+        public final int rcvWnd;
+        public final int rcvWndScale;
+
+        public TcpSocketInfo(InetAddress sAddr, int sPort, InetAddress dAddr,
+                int dPort, int writeSeq, int readSeq, int rWnd, int rWndScale) {
+            srcAddress = sAddr;
+            dstAddress = dAddr;
+            srcPort = sPort;
+            dstPort = dPort;
+            seq = writeSeq;
+            ack = readSeq;
+            rcvWnd = rWnd;
+            rcvWndScale = rWndScale;
+        }
+    }
+
+    @Override
+    public boolean equals(@Nullable final Object o) {
+        if (!(o instanceof TcpKeepalivePacketData)) return false;
+        final TcpKeepalivePacketData other = (TcpKeepalivePacketData) o;
+        return this.srcAddress.equals(other.srcAddress)
+                && this.dstAddress.equals(other.dstAddress)
+                && this.srcPort == other.srcPort
+                && this.dstPort == other.dstPort
+                && this.tcpAck == other.tcpAck
+                && this.tcpSeq == other.tcpSeq
+                && this.tcpWnd == other.tcpWnd
+                && this.tcpWndScale == other.tcpWndScale;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(srcAddress, dstAddress, srcPort, dstPort, tcpAck, tcpSeq, tcpWnd,
+                tcpWndScale);
+    }
+
+    /* Parcelable Implementation. */
+    /* Note that this object implements parcelable (and needs to keep doing this as it inherits
+     * from a class that does), but should usually be parceled as a stable parcelable using
+     * the toStableParcelable() and fromStableParcelable() methods.
+     */
+    public int describeContents() {
+        return 0;
+    }
+
+    /** Write to parcel. */
+    public void writeToParcel(Parcel out, int flags) {
+        super.writeToParcel(out, flags);
+        out.writeInt(tcpSeq);
+        out.writeInt(tcpAck);
+        out.writeInt(tcpWnd);
+        out.writeInt(tcpWndScale);
+    }
+
+    private TcpKeepalivePacketData(Parcel in) {
+        super(in);
+        tcpSeq = in.readInt();
+        tcpAck = in.readInt();
+        tcpWnd = in.readInt();
+        tcpWndScale = in.readInt();
+    }
+
+    /** Parcelable Creator. */
+    public static final Parcelable.Creator<TcpKeepalivePacketData> CREATOR =
+            new Parcelable.Creator<TcpKeepalivePacketData>() {
+                public TcpKeepalivePacketData createFromParcel(Parcel in) {
+                    return new TcpKeepalivePacketData(in);
+                }
+
+                public TcpKeepalivePacketData[] newArray(int size) {
+                    return new TcpKeepalivePacketData[size];
+                }
+            };
+
+    /**
+     * Convert this TcpKeepalivePacketData to a TcpKeepalivePacketDataParcelable.
+     */
+    @NonNull
+    public TcpKeepalivePacketDataParcelable toStableParcelable() {
+        final TcpKeepalivePacketDataParcelable parcel = new TcpKeepalivePacketDataParcelable();
+        parcel.srcAddress = srcAddress.getAddress();
+        parcel.srcPort = srcPort;
+        parcel.dstAddress = dstAddress.getAddress();
+        parcel.dstPort = dstPort;
+        parcel.seq = tcpSeq;
+        parcel.ack = tcpAck;
+        return parcel;
+    }
+
+    @Override
+    public String toString() {
+        return "saddr: " + srcAddress
+                + " daddr: " + dstAddress
+                + " sport: " + srcPort
+                + " dport: " + dstPort
+                + " seq: " + tcpSeq
+                + " ack: " + tcpAck
+                + " wnd: " + tcpWnd
+                + " wndScale: " + tcpWndScale;
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsPart.java b/core/java/android/net/TcpKeepalivePacketDataParcelable.aidl
similarity index 74%
rename from telephony/java/android/telephony/ims/RcsPart.java
rename to core/java/android/net/TcpKeepalivePacketDataParcelable.aidl
index da50173..7329c63 100644
--- a/telephony/java/android/telephony/ims/RcsPart.java
+++ b/core/java/android/net/TcpKeepalivePacketDataParcelable.aidl
@@ -13,13 +13,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package android.telephony.ims;
 
-import android.os.Parcelable;
+package android.net;
 
-/**
- * A part of a composite {@link RcsMessage}.
- * @hide - TODO(sahinc) make this public
- */
-public abstract class RcsPart implements Parcelable {
+parcelable TcpKeepalivePacketDataParcelable {
+    byte[] srcAddress;
+    int srcPort;
+    byte[] dstAddress;
+    int dstPort;
+    int seq;
+    int ack;
 }
diff --git a/core/java/android/net/TcpRepairWindow.java b/core/java/android/net/TcpRepairWindow.java
new file mode 100644
index 0000000..86034f0
--- /dev/null
+++ b/core/java/android/net/TcpRepairWindow.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+/**
+ * Corresponds to C's {@code struct tcp_repair_window} from
+ * include/uapi/linux/tcp.h
+ *
+ * @hide
+ */
+public final class TcpRepairWindow {
+    public final int sndWl1;
+    public final int sndWnd;
+    public final int maxWindow;
+    public final int rcvWnd;
+    public final int rcvWup;
+    public final int rcvWndScale;
+
+    /**
+     * Constructs an instance with the given field values.
+     */
+    public TcpRepairWindow(final int sndWl1, final int sndWnd, final int maxWindow,
+            final int rcvWnd, final int rcvWup, final int rcvWndScale) {
+        this.sndWl1 = sndWl1;
+        this.sndWnd = sndWnd;
+        this.maxWindow = maxWindow;
+        this.rcvWnd = rcvWnd;
+        this.rcvWup = rcvWup;
+        this.rcvWndScale = rcvWndScale;
+    }
+}
diff --git a/core/java/android/net/TcpSocketKeepalive.java b/core/java/android/net/TcpSocketKeepalive.java
new file mode 100644
index 0000000..8f6ee7b
--- /dev/null
+++ b/core/java/android/net/TcpSocketKeepalive.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.annotation.NonNull;
+import android.os.Binder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import java.io.FileDescriptor;
+import java.net.Socket;
+import java.util.concurrent.Executor;
+
+/** @hide */
+final class TcpSocketKeepalive extends SocketKeepalive {
+
+    private final Socket mSocket;
+
+    TcpSocketKeepalive(@NonNull IConnectivityManager service,
+            @NonNull Network network,
+            @NonNull Socket socket,
+            @NonNull Executor executor,
+            @NonNull Callback callback) {
+        super(service, network, executor, callback);
+        mSocket = socket;
+    }
+
+    /**
+     * Starts keepalives. {@code mSocket} must be a connected TCP socket.
+     *
+     * - The application must not write to or read from the socket after calling this method, until
+     *   onDataReceived, onStopped, or onError are called. If it does, the keepalive will fail
+     *   with {@link #ERROR_SOCKET_NOT_IDLE}, or {@code #ERROR_INVALID_SOCKET} if the socket
+     *   experienced an error (as in poll(2) returned POLLERR); if this happens, the data received
+     *   from the socket may be invalid, and the socket can't be recovered.
+     * - If the socket has data in the send or receive buffer, then this call will fail with
+     *   {@link #ERROR_SOCKET_NOT_IDLE} and can be retried after the data has been processed.
+     *   An app could ensure this by using an application-layer protocol where it can receive
+     *   acknowledgement that it will go into keepalive mode. It could then go into keepalive
+     *   mode after having read the acknowledgement, draining the socket.
+     */
+    @Override
+    void startImpl(int intervalSec) {
+        try {
+            final FileDescriptor fd = mSocket.getFileDescriptor$();
+            mService.startTcpKeepalive(mNetwork, fd, intervalSec, mMessenger, new Binder());
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error starting packet keepalive: ", e);
+            stopLooper();
+        }
+    }
+
+    @Override
+    void stopImpl() {
+        try {
+            if (mSlot != null) {
+                mService.stopKeepalive(mNetwork, mSlot);
+            }
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error stopping packet keepalive: ", e);
+            stopLooper();
+        }
+    }
+}
diff --git a/core/java/android/net/ip/IIpClient.aidl b/core/java/android/net/ip/IIpClient.aidl
index 7769ec2..a4a80e1 100644
--- a/core/java/android/net/ip/IIpClient.aidl
+++ b/core/java/android/net/ip/IIpClient.aidl
@@ -17,6 +17,7 @@
 
 import android.net.ProxyInfoParcelable;
 import android.net.ProvisioningConfigurationParcelable;
+import android.net.TcpKeepalivePacketDataParcelable;
 
 /** @hide */
 oneway interface IIpClient {
@@ -29,4 +30,6 @@
     void setTcpBufferSizes(in String tcpBufferSizes);
     void setHttpProxy(in ProxyInfoParcelable proxyInfo);
     void setMulticastFilter(boolean enabled);
+    void addKeepalivePacketFilter(int slot, in TcpKeepalivePacketDataParcelable pkt);
+    void removeKeepalivePacketFilter(int slot);
 }
diff --git a/core/java/android/os/AsyncTask.java b/core/java/android/os/AsyncTask.java
index 141d33b..1f33693 100644
--- a/core/java/android/os/AsyncTask.java
+++ b/core/java/android/os/AsyncTask.java
@@ -19,6 +19,7 @@
 import android.annotation.MainThread;
 import android.annotation.Nullable;
 import android.annotation.WorkerThread;
+
 import java.util.ArrayDeque;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.Callable;
@@ -70,7 +71,7 @@
  *     protected Long doInBackground(URL... urls) {
  *         int count = urls.length;
  *         long totalSize = 0;
- *         for (int i = 0; i < count; i++) {
+ *         for (int i = 0; i &lt; count; i++) {
  *             totalSize += Downloader.downloadFile(urls[i]);
  *             publishProgress((int) ((i / (float) count) * 100));
  *             // Escape early if cancel() is called
@@ -158,13 +159,22 @@
  * </ul>
  *
  * <h2>Memory observability</h2>
- * <p>AsyncTask guarantees that all callback calls are synchronized in such a way that the following
- * operations are safe without explicit synchronizations.</p>
+ * <p>AsyncTask guarantees that all callback calls are synchronized to ensure the following
+ * without explicit synchronizations.</p>
  * <ul>
- *     <li>Set member fields in the constructor or {@link #onPreExecute}, and refer to them
- *     in {@link #doInBackground}.
- *     <li>Set member fields in {@link #doInBackground}, and refer to them in
- *     {@link #onProgressUpdate} and {@link #onPostExecute}.
+ *     <li>The memory effects of {@link #onPreExecute}, and anything else
+ *     executed before the call to {@link #execute}, including the construction
+ *     of the AsyncTask object, are visible to {@link #doInBackground}.
+ *     <li>The memory effects of {@link #doInBackground} are visible to
+ *     {@link #onPostExecute}.
+ *     <li>Any memory effects of {@link #doInBackground} preceding a call
+ *     to {@link #publishProgress} are visible to the corresponding
+ *     {@link #onProgressUpdate} call. (But {@link #doInBackground} continues to
+ *     run, and care needs to be taken that later updates in {@link #doInBackground}
+ *     do not interfere with an in-progress {@link #onProgressUpdate} call.)
+ *     <li>Any memory effects preceding a call to {@link #cancel} are visible
+ *     after a call to {@link #isCancelled} that returns true as a result, or
+ *     during and after a resulting call to {@link #onCancelled}.
  * </ul>
  *
  * <h2>Order of execution</h2>
@@ -388,6 +398,10 @@
      * specified parameters are the parameters passed to {@link #execute}
      * by the caller of this task.
      *
+     * This will normally run on a background thread. But to better
+     * support testing frameworks, it is recommended that this also tolerates
+     * direct execution on the foreground thread, as part of the {@link #execute} call.
+     *
      * This method can call {@link #publishProgress} to publish updates
      * on the UI thread.
      *
@@ -404,6 +418,8 @@
 
     /**
      * Runs on the UI thread before {@link #doInBackground}.
+     * Invoked directly by {@link #execute} or {@link #executeOnExecutor}.
+     * The default version does nothing.
      *
      * @see #onPostExecute
      * @see #doInBackground
@@ -414,7 +430,10 @@
 
     /**
      * <p>Runs on the UI thread after {@link #doInBackground}. The
-     * specified result is the value returned by {@link #doInBackground}.</p>
+     * specified result is the value returned by {@link #doInBackground}.
+     * To better support testing frameworks, it is recommended that this be
+     * written to tolerate direct execution as part of the execute() call.
+     * The default version does nothing.</p>
      * 
      * <p>This method won't be invoked if the task was cancelled.</p>
      *
@@ -432,6 +451,7 @@
     /**
      * Runs on the UI thread after {@link #publishProgress} is invoked.
      * The specified values are the values passed to {@link #publishProgress}.
+     * The default version does nothing.
      *
      * @param values The values indicating progress.
      *
@@ -466,7 +486,8 @@
     /**
      * <p>Applications should preferably override {@link #onCancelled(Object)}.
      * This method is invoked by the default implementation of
-     * {@link #onCancelled(Object)}.</p>
+     * {@link #onCancelled(Object)}.
+     * The default version does nothing.</p>
      * 
      * <p>Runs on the UI thread after {@link #cancel(boolean)} is invoked and
      * {@link #doInBackground(Object[])} has finished.</p>
@@ -504,12 +525,16 @@
      * an attempt to stop the task.</p>
      * 
      * <p>Calling this method will result in {@link #onCancelled(Object)} being
-     * invoked on the UI thread after {@link #doInBackground(Object[])}
-     * returns. Calling this method guarantees that {@link #onPostExecute(Object)}
-     * is never invoked. After invoking this method, you should check the
-     * value returned by {@link #isCancelled()} periodically from
-     * {@link #doInBackground(Object[])} to finish the task as early as
-     * possible.</p>
+     * invoked on the UI thread after {@link #doInBackground(Object[])} returns.
+     * Calling this method guarantees that onPostExecute(Object) is never
+     * subsequently invoked, even if <tt>cancel</tt> returns false, but
+     * {@link #onPostExecute} has not yet run.  To finish the
+     * task as early as possible, check {@link #isCancelled()} periodically from
+     * {@link #doInBackground(Object[])}.</p>
+     *
+     * <p>This only requests cancellation. It never waits for a running
+     * background task to terminate, even if <tt>mayInterruptIfRunning</tt> is
+     * true.</p>
      *
      * @param mayInterruptIfRunning <tt>true</tt> if the thread executing this
      *        task should be interrupted; otherwise, in-progress tasks are allowed
diff --git a/core/java/android/os/BugreportManager.java b/core/java/android/os/BugreportManager.java
index 3a5b8a8..27f7e22 100644
--- a/core/java/android/os/BugreportManager.java
+++ b/core/java/android/os/BugreportManager.java
@@ -24,7 +24,8 @@
 import android.annotation.SystemApi;
 import android.annotation.SystemService;
 import android.content.Context;
-import android.os.IBinder.DeathRecipient;
+
+import com.android.internal.util.Preconditions;
 
 import java.io.FileDescriptor;
 import java.lang.annotation.Retention;
@@ -127,13 +128,16 @@
             @NonNull BugreportParams params,
             @NonNull @CallbackExecutor Executor executor,
             @NonNull BugreportCallback callback) {
-        // TODO(b/111441001): Enforce android.Manifest.permission.DUMP if necessary.
+        Preconditions.checkNotNull(bugreportFd);
+        Preconditions.checkNotNull(params);
+        Preconditions.checkNotNull(executor);
+        Preconditions.checkNotNull(callback);
         DumpstateListener dsListener = new DumpstateListener(executor, callback);
         try {
             // Note: mBinder can get callingUid from the binder transaction.
             mBinder.startBugreport(-1 /* callingUid */,
                     mContext.getOpPackageName(),
-                    (bugreportFd != null ? bugreportFd.getFileDescriptor() : new FileDescriptor()),
+                    bugreportFd.getFileDescriptor(),
                     (screenshotFd != null
                             ? screenshotFd.getFileDescriptor() : new FileDescriptor()),
                     params.getMode(), dsListener);
@@ -154,8 +158,7 @@
         }
     }
 
-    private final class DumpstateListener extends IDumpstateListener.Stub
-            implements DeathRecipient {
+    private final class DumpstateListener extends IDumpstateListener.Stub {
         private final Executor mExecutor;
         private final BugreportCallback mCallback;
 
@@ -165,11 +168,6 @@
         }
 
         @Override
-        public void binderDied() {
-            // TODO(b/111441001): implement
-        }
-
-        @Override
         public void onProgress(int progress) throws RemoteException {
             final long identity = Binder.clearCallingIdentity();
             try {
diff --git a/core/jni/OWNERS b/core/jni/OWNERS
index 86342c4..774c224 100644
--- a/core/jni/OWNERS
+++ b/core/jni/OWNERS
@@ -3,7 +3,7 @@
 per-file *Camera*,*camera* = shuzhenwang@google.com, yinchiayeh@google.com, zhijunhe@google.com
 
 # Connectivity
-per-file android_net_* = ek@google.com, lorenzo@google.com, satk@google.com
+per-file android_net_* = codewiz@google.com, jchalard@google.com, lorenzo@google.com, reminv@google.com, satk@google.com
 
 # Zygote
 per-file com_android_inernal_os_Zygote.*,fd_utils.* = chriswailes@google.com, ngeoffray@google.com, sehr@google.com, narayan@google.com, maco@google.com
diff --git a/core/jni/android_net_NetUtils.cpp b/core/jni/android_net_NetUtils.cpp
index 7eddcfe..cfb2dd1 100644
--- a/core/jni/android_net_NetUtils.cpp
+++ b/core/jni/android_net_NetUtils.cpp
@@ -29,6 +29,7 @@
 #include <net/if.h>
 #include <linux/filter.h>
 #include <linux/if_arp.h>
+#include <linux/tcp.h>
 #include <netinet/ether.h>
 #include <netinet/icmp6.h>
 #include <netinet/ip.h>
@@ -226,6 +227,34 @@
     }
 }
 
+static void android_net_utils_attachDropAllBPFFilter(JNIEnv *env, jobject clazz, jobject javaFd)
+{
+    struct sock_filter filter_code[] = {
+        // Reject all.
+        BPF_STMT(BPF_RET | BPF_K, 0)
+    };
+    struct sock_fprog filter = {
+        sizeof(filter_code) / sizeof(filter_code[0]),
+        filter_code,
+    };
+
+    int fd = jniGetFDFromFileDescriptor(env, javaFd);
+    if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter)) != 0) {
+        jniThrowExceptionFmt(env, "java/net/SocketException",
+                "setsockopt(SO_ATTACH_FILTER): %s", strerror(errno));
+    }
+}
+
+static void android_net_utils_detachBPFFilter(JNIEnv *env, jobject clazz, jobject javaFd)
+{
+    int dummy = 0;
+    int fd = jniGetFDFromFileDescriptor(env, javaFd);
+    if (setsockopt(fd, SOL_SOCKET, SO_DETACH_FILTER, &dummy, sizeof(dummy)) != 0) {
+        jniThrowExceptionFmt(env, "java/net/SocketException",
+                "setsockopt(SO_DETACH_FILTER): %s", strerror(errno));
+    }
+
+}
 static void android_net_utils_setupRaSocket(JNIEnv *env, jobject clazz, jobject javaFd,
         jint ifIndex)
 {
@@ -458,6 +487,41 @@
     return answer;
 }
 
+static jobject android_net_utils_getTcpRepairWindow(JNIEnv *env, jobject thiz, jobject javaFd) {
+    if (javaFd == NULL) {
+        jniThrowNullPointerException(env, NULL);
+        return NULL;
+    }
+
+    int fd = jniGetFDFromFileDescriptor(env, javaFd);
+    struct tcp_repair_window trw = {};
+    socklen_t size = sizeof(trw);
+
+    // Obtain the parameters of the TCP repair window.
+    int rc = getsockopt(fd, IPPROTO_TCP, TCP_REPAIR_WINDOW, &trw, &size);
+    if (rc == -1) {
+      throwErrnoException(env, "getsockopt : TCP_REPAIR_WINDOW", errno);
+      return NULL;
+    }
+
+    struct tcp_info tcpinfo = {};
+    socklen_t tcpinfo_size = sizeof(tcp_info);
+
+    // Obtain the window scale from the tcp info structure. This contains a scale factor that
+    // should be applied to the window size.
+    rc = getsockopt(fd, IPPROTO_TCP, TCP_INFO, &tcpinfo, &tcpinfo_size);
+    if (rc == -1) {
+      throwErrnoException(env, "getsockopt : TCP_INFO", errno);
+      return NULL;
+    }
+
+    jclass class_TcpRepairWindow = env->FindClass("android/net/TcpRepairWindow");
+    jmethodID ctor = env->GetMethodID(class_TcpRepairWindow, "<init>", "(IIIIII)V");
+
+    return env->NewObject(class_TcpRepairWindow, ctor, trw.snd_wl1, trw.snd_wnd, trw.max_window,
+            trw.rcv_wnd, trw.rcv_wup, tcpinfo.tcpi_rcv_wscale);
+}
+
 // ----------------------------------------------------------------------------
 
 /*
@@ -475,6 +539,9 @@
     { "attachDhcpFilter", "(Ljava/io/FileDescriptor;)V", (void*) android_net_utils_attachDhcpFilter },
     { "attachRaFilter", "(Ljava/io/FileDescriptor;I)V", (void*) android_net_utils_attachRaFilter },
     { "attachControlPacketFilter", "(Ljava/io/FileDescriptor;I)V", (void*) android_net_utils_attachControlPacketFilter },
+    { "attachDropAllBPFFilter", "(Ljava/io/FileDescriptor;)V", (void*) android_net_utils_attachDropAllBPFFilter },
+    { "detachBPFFilter", "(Ljava/io/FileDescriptor;)V", (void*) android_net_utils_detachBPFFilter },
+    { "getTcpRepairWindow", "(Ljava/io/FileDescriptor;)Landroid/net/TcpRepairWindow;", (void*) android_net_utils_getTcpRepairWindow },
     { "setupRaSocket", "(Ljava/io/FileDescriptor;I)V", (void*) android_net_utils_setupRaSocket },
     { "resNetworkSend", "(I[BII)Ljava/io/FileDescriptor;", (void*) android_net_utils_resNetworkSend },
     { "resNetworkQuery", "(ILjava/lang/String;III)Ljava/io/FileDescriptor;", (void*) android_net_utils_resNetworkQuery },
diff --git a/core/jni/android_util_Process.cpp b/core/jni/android_util_Process.cpp
index 9782541..32ddad1 100644
--- a/core/jni/android_util_Process.cpp
+++ b/core/jni/android_util_Process.cpp
@@ -346,30 +346,34 @@
 static void get_cpuset_cores_for_policy(SchedPolicy policy, cpu_set_t *cpu_set)
 {
     FILE *file;
-    const char *filename;
+    std::string filename;
 
     CPU_ZERO(cpu_set);
 
     switch (policy) {
         case SP_BACKGROUND:
-            filename = "/dev/cpuset/background/cpus";
+            if (!CgroupGetAttributePath("LowCapacityCPUs", &filename)) {
+                return;
+            }
             break;
         case SP_FOREGROUND:
         case SP_AUDIO_APP:
         case SP_AUDIO_SYS:
         case SP_RT_APP:
-            filename = "/dev/cpuset/foreground/cpus";
+            if (!CgroupGetAttributePath("HighCapacityCPUs", &filename)) {
+                return;
+            }
             break;
         case SP_TOP_APP:
-            filename = "/dev/cpuset/top-app/cpus";
+            if (!CgroupGetAttributePath("MaxCapacityCPUs", &filename)) {
+                return;
+            }
             break;
         default:
-            filename = NULL;
+            return;
     }
 
-    if (!filename) return;
-
-    file = fopen(filename, "re");
+    file = fopen(filename.c_str(), "re");
     if (file != NULL) {
         // Parse cpus string
         char *line = NULL;
@@ -379,7 +383,7 @@
         if (num_read > 0) {
             parse_cpuset_cpus(line, cpu_set);
         } else {
-            ALOGE("Failed to read %s", filename);
+            ALOGE("Failed to read %s", filename.c_str());
         }
         free(line);
     }
diff --git a/core/jni/com_android_internal_os_Zygote.cpp b/core/jni/com_android_internal_os_Zygote.cpp
index 1448d7b..3012c90 100644
--- a/core/jni/com_android_internal_os_Zygote.cpp
+++ b/core/jni/com_android_internal_os_Zygote.cpp
@@ -1305,15 +1305,12 @@
           RuntimeAbort(env, __LINE__, "System server process has died. Restarting Zygote!");
       }
 
-      bool low_ram_device = GetBoolProperty("ro.config.low_ram", false);
-      bool per_app_memcg = GetBoolProperty("ro.config.per_app_memcg", low_ram_device);
-      if (per_app_memcg) {
+      if (UsePerAppMemcg()) {
           // Assign system_server to the correct memory cgroup.
-          // Not all devices mount /dev/memcg so check for the file first
+          // Not all devices mount memcg so check if it is mounted first
           // to avoid unnecessarily printing errors and denials in the logs.
-          if (!access("/dev/memcg/system/tasks", F_OK) &&
-                !WriteStringToFile(StringPrintf("%d", pid), "/dev/memcg/system/tasks")) {
-              ALOGE("couldn't write %d to /dev/memcg/system/tasks", pid);
+          if (!SetTaskProfiles(pid, std::vector<std::string>{"SystemMemoryProcess"})) {
+              ALOGE("couldn't add process %d into system memcg group", pid);
           }
       }
   }
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 9a7e8dd..7590675 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -481,6 +481,7 @@
     <protected-broadcast android:name="android.security.action.TRUST_STORE_CHANGED" />
     <protected-broadcast android:name="android.security.action.KEYCHAIN_CHANGED" />
     <protected-broadcast android:name="android.security.action.KEY_ACCESS_CHANGED" />
+    <protected-broadcast android:name="android.telecom.action.NUISANCE_CALL_STATUS_CHANGED" />
     <protected-broadcast android:name="android.telecom.action.PHONE_ACCOUNT_REGISTERED" />
     <protected-broadcast android:name="android.telecom.action.PHONE_ACCOUNT_UNREGISTERED" />
     <protected-broadcast android:name="android.telecom.action.SHOW_MISSED_CALLS_NOTIFICATION" />
diff --git a/data/etc/Android.bp b/data/etc/Android.bp
index 035ee10..bb47658 100644
--- a/data/etc/Android.bp
+++ b/data/etc/Android.bp
@@ -58,6 +58,14 @@
 }
 
 prebuilt_etc {
+    name: "privapp_whitelist_com.android.dialer",
+    product_specific: true,
+    sub_dir: "permissions",
+    src: "com.android.dialer.xml",
+    filename_from_src: true,
+}
+
+prebuilt_etc {
     name: "privapp_whitelist_com.android.launcher3",
     product_specific: true,
     sub_dir: "permissions",
diff --git a/data/etc/com.android.dialer.xml b/data/etc/com.android.dialer.xml
new file mode 100644
index 0000000..ccdb21f
--- /dev/null
+++ b/data/etc/com.android.dialer.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2019 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+  -->
+<permissions>
+    <privapp-permissions package="com.android.dialer">
+        <permission name="android.permission.ALLOW_ANY_CODEC_FOR_PLAYBACK"/>
+        <permission name="android.permission.CONTROL_INCALL_EXPERIENCE"/>
+        <permission name="android.permission.GET_ACCOUNTS_PRIVILEGED"/>
+        <permission name="android.permission.MODIFY_PHONE_STATE"/>
+        <permission name="android.permission.STATUS_BAR"/>
+        <permission name="android.permission.STOP_APP_SWITCHES"/>
+        <permission name="com.android.voicemail.permission.READ_VOICEMAIL"/>
+        <permission name="com.android.voicemail.permission.WRITE_VOICEMAIL"/>
+    </privapp-permissions>
+</permissions>
diff --git a/data/etc/privapp-permissions-platform.xml b/data/etc/privapp-permissions-platform.xml
index c9f0f10..9a148e4 100644
--- a/data/etc/privapp-permissions-platform.xml
+++ b/data/etc/privapp-permissions-platform.xml
@@ -48,17 +48,6 @@
         <permission name="android.permission.WRITE_MEDIA_STORAGE"/>
     </privapp-permissions>
 
-    <privapp-permissions package="com.android.dialer">
-        <permission name="android.permission.ALLOW_ANY_CODEC_FOR_PLAYBACK"/>
-        <permission name="android.permission.CONTROL_INCALL_EXPERIENCE"/>
-        <permission name="android.permission.GET_ACCOUNTS_PRIVILEGED"/>
-        <permission name="android.permission.MODIFY_PHONE_STATE"/>
-        <permission name="android.permission.STATUS_BAR"/>
-        <permission name="android.permission.STOP_APP_SWITCHES"/>
-        <permission name="com.android.voicemail.permission.READ_VOICEMAIL"/>
-        <permission name="com.android.voicemail.permission.WRITE_VOICEMAIL"/>
-    </privapp-permissions>
-
     <privapp-permissions package="com.android.emergency">
         <!-- Required to place emergency calls from emergency info screen. -->
         <permission name="android.permission.CALL_PRIVILEGED"/>
diff --git a/media/jni/Android.bp b/media/jni/Android.bp
index 4c563db..25c7b5c 100644
--- a/media/jni/Android.bp
+++ b/media/jni/Android.bp
@@ -51,6 +51,7 @@
         "libmtp",
         "libexif",
         "libpiex",
+        "libprocessgroup",
         "libandroidfw",
         "libhidlallocatorutils",
         "libhidlbase",
@@ -131,6 +132,7 @@
         "libcutils",
         "libdexfile",
         "liblzma",
+        "libjsoncpp",
         "libmedia_helper",
         "libmedia_player2_util",
         "libmediadrm",
@@ -140,6 +142,7 @@
         "libmediautils",
         "libnativehelper",
         "libnetd_client",
+        "libprocessgroup",
         "libstagefright_esds",
         "libstagefright_foundation",
         "libstagefright_httplive",
diff --git a/packages/NetworkStack/OWNERS b/packages/NetworkStack/OWNERS
new file mode 100644
index 0000000..a395465
--- /dev/null
+++ b/packages/NetworkStack/OWNERS
@@ -0,0 +1,5 @@
+codewiz@google.com
+jchalard@google.com
+lorenzo@google.com
+reminv@google.com
+satk@google.com
diff --git a/packages/NetworkStack/src/android/net/apf/ApfFilter.java b/packages/NetworkStack/src/android/net/apf/ApfFilter.java
index 4fa7d64..923f162 100644
--- a/packages/NetworkStack/src/android/net/apf/ApfFilter.java
+++ b/packages/NetworkStack/src/android/net/apf/ApfFilter.java
@@ -23,6 +23,7 @@
 import static android.system.OsConstants.ETH_P_IP;
 import static android.system.OsConstants.ETH_P_IPV6;
 import static android.system.OsConstants.IPPROTO_ICMPV6;
+import static android.system.OsConstants.IPPROTO_TCP;
 import static android.system.OsConstants.IPPROTO_UDP;
 import static android.system.OsConstants.SOCK_RAW;
 
@@ -38,6 +39,7 @@
 import android.content.IntentFilter;
 import android.net.LinkAddress;
 import android.net.LinkProperties;
+import android.net.TcpKeepalivePacketDataParcelable;
 import android.net.apf.ApfGenerator.IllegalInstructionException;
 import android.net.apf.ApfGenerator.Register;
 import android.net.ip.IpClient.IpClientCallbacksWrapper;
@@ -55,6 +57,7 @@
 import android.text.format.DateUtils;
 import android.util.Log;
 import android.util.Pair;
+import android.util.SparseArray;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
@@ -149,7 +152,9 @@
         DROPPED_IPV6_NON_ICMP_MULTICAST,
         DROPPED_802_3_FRAME,
         DROPPED_ETHERTYPE_BLACKLISTED,
-        DROPPED_ARP_REPLY_SPA_NO_HOST;
+        DROPPED_ARP_REPLY_SPA_NO_HOST,
+        DROPPED_IPV4_KEEPALIVE_ACK,
+        DROPPED_IPV6_KEEPALIVE_ACK;
 
         // Returns the negative byte offset from the end of the APF data segment for
         // a given counter.
@@ -285,6 +290,7 @@
     private static final int IPV4_DEST_ADDR_OFFSET = ETH_HEADER_LEN + 16;
     private static final int IPV4_ANY_HOST_ADDRESS = 0;
     private static final int IPV4_BROADCAST_ADDRESS = -1; // 255.255.255.255
+    private static final int IPV4_HEADER_LEN = 20; // Without options
 
     // Traffic class and Flow label are not byte aligned. Luckily we
     // don't care about either value so we'll consider bytes 1-3 of the
@@ -305,6 +311,8 @@
     private static final int UDP_DESTINATION_PORT_OFFSET = ETH_HEADER_LEN + 2;
     private static final int UDP_HEADER_LEN = 8;
 
+    private static final int TCP_HEADER_SIZE_OFFSET = 12;
+
     private static final int DHCP_CLIENT_PORT = 68;
     // NOTE: this must be added to the IPv4 header length in IPV4_HEADER_SIZE_MEMORY_SLOT
     private static final int DHCP_CLIENT_MAC_OFFSET = ETH_HEADER_LEN + UDP_HEADER_LEN + 28;
@@ -788,7 +796,7 @@
 
         boolean isExpired() {
             // TODO: We may want to handle 0 lifetime RAs differently, if they are common. We'll
-            // have to calculte the filter lifetime specially as a fraction of 0 is still 0.
+            // have to calculate the filter lifetime specially as a fraction of 0 is still 0.
             return currentLifetime() <= 0;
         }
 
@@ -847,11 +855,147 @@
         }
     }
 
+    // A class to hold keepalive ack information.
+    private abstract static class TcpKeepaliveAck {
+        // Note that the offset starts from IP header.
+        // These must be added ether header length when generating program.
+        static final int IP_HEADER_OFFSET = 0;
+
+        protected static class TcpKeepaliveAckData {
+            public final byte[] srcAddress;
+            public final int srcPort;
+            public final byte[] dstAddress;
+            public final int dstPort;
+            public final int seq;
+            public final int ack;
+            // Create the characteristics of the ack packet from the sent keepalive packet.
+            TcpKeepaliveAckData(final TcpKeepalivePacketDataParcelable sentKeepalivePacket) {
+                srcAddress = sentKeepalivePacket.dstAddress;
+                srcPort = sentKeepalivePacket.dstPort;
+                dstAddress = sentKeepalivePacket.srcAddress;
+                dstPort = sentKeepalivePacket.srcPort;
+                seq = sentKeepalivePacket.ack;
+                ack = sentKeepalivePacket.seq + 1;
+            }
+        }
+
+        protected final TcpKeepaliveAckData mPacket;
+        protected final byte[] mSrcDstAddr;
+
+        TcpKeepaliveAck(final TcpKeepaliveAckData packet, final byte[] srcDstAddr) {
+            mPacket = packet;
+            mSrcDstAddr = srcDstAddr;
+        }
+
+        static byte[] concatArrays(final byte[]... arr) {
+            int size = 0;
+            for (byte[] a : arr) {
+                size += a.length;
+            }
+            final byte[] result = new byte[size];
+            int offset = 0;
+            for (byte[] a : arr) {
+                System.arraycopy(a, 0, result, offset, a.length);
+                offset += a.length;
+            }
+            return result;
+        }
+
+        public String toString() {
+            return String.format("%s(%d) -> %s(%d), seq=%d, ack=%d",
+                    mPacket.srcAddress,
+                    mPacket.srcPort,
+                    mPacket.dstAddress,
+                    mPacket.dstPort,
+                    mPacket.seq,
+                    mPacket.ack);
+        }
+
+        // Append a filter for this keepalive ack to {@code gen}.
+        // Jump to drop if it matches the keepalive ack.
+        // Jump to the next filter if packet doesn't match the keepalive ack.
+        abstract void generateFilterLocked(ApfGenerator gen) throws IllegalInstructionException;
+    }
+
+    private class TcpKeepaliveAckV4 extends TcpKeepaliveAck {
+        private static final int IPV4_SRC_ADDR_OFFSET = IP_HEADER_OFFSET + 12;
+        private static final int IPV4_TCP_SRC_PORT_OFFSET = 0;
+        private static final int IPV4_TCP_DST_PORT_OFFSET = 2;
+        private static final int IPV4_TCP_SEQ_OFFSET = 4;
+        private static final int IPV4_TCP_ACK_OFFSET = 8;
+
+        TcpKeepaliveAckV4(final TcpKeepalivePacketDataParcelable sentKeepalivePacket) {
+            this(new TcpKeepaliveAckData(sentKeepalivePacket));
+        }
+        TcpKeepaliveAckV4(final TcpKeepaliveAckData packet) {
+            super(packet, concatArrays(packet.srcAddress, packet.dstAddress) /* srcDstAddr */);
+        }
+
+        @Override
+        void generateFilterLocked(ApfGenerator gen) throws IllegalInstructionException {
+            final String nextFilterLabel = "keepalive_ack" + getUniqueNumberLocked();
+            gen.addLoad8(Register.R0, IPV4_PROTOCOL_OFFSET);
+            gen.addJumpIfR0NotEquals(IPPROTO_TCP, nextFilterLabel);
+            gen.addLoadImmediate(Register.R0, ETH_HEADER_LEN + IPV4_SRC_ADDR_OFFSET);
+            gen.addJumpIfBytesNotEqual(Register.R0, mSrcDstAddr, nextFilterLabel);
+
+            // Pass the packet if it's not zero-sized :
+            // Load the IP header size into R1
+            gen.addLoadFromMemory(Register.R1, gen.IPV4_HEADER_SIZE_MEMORY_SLOT);
+            // Load the TCP header size into R0 (it's indexed by R1)
+            gen.addLoad8Indexed(Register.R0, ETH_HEADER_LEN + TCP_HEADER_SIZE_OFFSET);
+            // Size offset is in the top nibble, but it must be multiplied by 4, and the two
+            // top bits of the low nibble are guaranteed to be zeroes. Right-shift R0 by 2.
+            gen.addRightShift(2);
+            // R0 += R1 -> R0 contains TCP + IP headers lenght
+            gen.addAddR1();
+            // Add the Ethernet header length to R0.
+            gen.addLoadImmediate(Register.R1, ETH_HEADER_LEN);
+            gen.addAddR1();
+            // Compare total length of headers to the size of the packet.
+            gen.addLoadFromMemory(Register.R1, gen.PACKET_SIZE_MEMORY_SLOT);
+            gen.addNeg(Register.R0);
+            gen.addAddR1();
+            gen.addJumpIfR0NotEquals(0, nextFilterLabel);
+
+            // Add IPv4 header length
+            gen.addLoadFromMemory(Register.R1, gen.IPV4_HEADER_SIZE_MEMORY_SLOT);
+            gen.addLoad16Indexed(Register.R0, ETH_HEADER_LEN + IPV4_TCP_SRC_PORT_OFFSET);
+            gen.addJumpIfR0NotEquals(mPacket.srcPort, nextFilterLabel);
+            gen.addLoad16Indexed(Register.R0, ETH_HEADER_LEN + IPV4_TCP_DST_PORT_OFFSET);
+            gen.addJumpIfR0NotEquals(mPacket.dstPort, nextFilterLabel);
+            gen.addLoad32Indexed(Register.R0, ETH_HEADER_LEN + IPV4_TCP_SEQ_OFFSET);
+            gen.addJumpIfR0NotEquals(mPacket.seq, nextFilterLabel);
+            gen.addLoad32Indexed(Register.R0, ETH_HEADER_LEN + IPV4_TCP_ACK_OFFSET);
+            gen.addJumpIfR0NotEquals(mPacket.ack, nextFilterLabel);
+
+            maybeSetupCounter(gen, Counter.DROPPED_IPV4_KEEPALIVE_ACK);
+            gen.addJump(mCountAndDropLabel);
+            gen.defineLabel(nextFilterLabel);
+        }
+    }
+
+    private class TcpKeepaliveAckV6 extends TcpKeepaliveAck {
+        TcpKeepaliveAckV6(final TcpKeepalivePacketDataParcelable sentKeepalivePacket) {
+            this(new TcpKeepaliveAckData(sentKeepalivePacket));
+        }
+        TcpKeepaliveAckV6(final TcpKeepaliveAckData packet) {
+            super(packet, concatArrays(packet.srcAddress, packet.dstAddress) /* srcDstAddr */);
+        }
+
+        @Override
+        void generateFilterLocked(ApfGenerator gen) throws IllegalInstructionException {
+            throw new UnsupportedOperationException("IPv6 Keepalive is not supported yet");
+        }
+    }
+
     // Maximum number of RAs to filter for.
     private static final int MAX_RAS = 10;
 
     @GuardedBy("this")
-    private ArrayList<Ra> mRas = new ArrayList<Ra>();
+    private ArrayList<Ra> mRas = new ArrayList<>();
+    @GuardedBy("this")
+    private SparseArray<TcpKeepaliveAck> mKeepaliveAcks = new SparseArray<>();
 
     // There is always some marginal benefit to updating the installed APF program when an RA is
     // seen because we can extend the program's lifetime slightly, but there is some cost to
@@ -980,6 +1124,8 @@
         //     drop
         //   if it's IPv4 broadcast:
         //     drop
+        // if keepalive ack
+        //   drop
         // pass
 
         if (mMulticastFilter) {
@@ -1023,6 +1169,9 @@
                 gen.addJumpIfR0Equals(broadcastAddr, mCountAndDropLabel);
             }
 
+            // If any keepalive filters,
+            generateKeepaliveFilter(gen);
+
             // If L2 broadcast packet, drop.
             // TODO: can we invert this condition to fall through to the common pass case below?
             maybeSetupCounter(gen, Counter.PASSED_IPV4_UNICAST);
@@ -1030,6 +1179,8 @@
             gen.addJumpIfBytesNotEqual(Register.R0, ETH_BROADCAST_MAC_ADDRESS, mCountAndPassLabel);
             maybeSetupCounter(gen, Counter.DROPPED_IPV4_L2_BROADCAST);
             gen.addJump(mCountAndDropLabel);
+        } else {
+            generateKeepaliveFilter(gen);
         }
 
         // Otherwise, pass
@@ -1037,6 +1188,13 @@
         gen.addJump(mCountAndPassLabel);
     }
 
+    private void generateKeepaliveFilter(ApfGenerator gen) throws IllegalInstructionException {
+        // Drop IPv4 Keepalive acks
+        for (int i = 0; i < mKeepaliveAcks.size(); ++i) {
+            final TcpKeepaliveAck ack = mKeepaliveAcks.valueAt(i);
+            if (ack instanceof TcpKeepaliveAckV4) ack.generateFilterLocked(gen);
+        }
+    }
 
     /**
      * Generate filter code to process IPv6 packets. Execution of this code ends in either the
@@ -1057,6 +1215,8 @@
         //   drop
         // if it's ICMPv6 NA to ff02::1:
         //   drop
+        // if keepalive ack
+        //   drop
 
         gen.addLoad8(Register.R0, IPV6_NEXT_HEADER_OFFSET);
 
@@ -1112,6 +1272,12 @@
         maybeSetupCounter(gen, Counter.DROPPED_IPV6_MULTICAST_NA);
         gen.addJump(mCountAndDropLabel);
         gen.defineLabel(skipUnsolicitedMulticastNALabel);
+
+        // Drop IPv6 Keepalive acks
+        for (int i = 0; i < mKeepaliveAcks.size(); ++i) {
+            final TcpKeepaliveAck ack = mKeepaliveAcks.valueAt(i);
+            if (ack instanceof TcpKeepaliveAckV6) ack.generateFilterLocked(gen);
+        }
     }
 
     /**
@@ -1489,6 +1655,36 @@
         installNewProgramLocked();
     }
 
+    /**
+     * Add keepalive ack packet filter.
+     * This will add a filter to drop acks to the keepalive packet passed as an argument.
+     *
+     * @param slot The index used to access the filter.
+     * @param sentKeepalivePacket The attributes of the sent keepalive packet.
+     */
+    public synchronized void addKeepalivePacketFilter(final int slot,
+            final TcpKeepalivePacketDataParcelable sentKeepalivePacket) {
+        log("Adding keepalive ack(" + slot + ")");
+        if (null != mKeepaliveAcks.get(slot)) {
+            throw new IllegalArgumentException("Keepalive slot " + slot + " is occupied");
+        }
+        final int ipVersion = sentKeepalivePacket.srcAddress.length == 4 ? 4 : 6;
+        mKeepaliveAcks.put(slot, (ipVersion == 4)
+                ? new TcpKeepaliveAckV4(sentKeepalivePacket)
+                : new TcpKeepaliveAckV6(sentKeepalivePacket));
+        installNewProgramLocked();
+    }
+
+    /**
+     * Remove keepalive packet filter.
+     *
+     * @param slot The index used to access the filter.
+     */
+    public synchronized void removeKeepalivePacketFilter(int slot) {
+        mKeepaliveAcks.remove(slot);
+        installNewProgramLocked();
+    }
+
     static public long counterValue(byte[] data, Counter counter)
             throws ArrayIndexOutOfBoundsException {
         // Follow the same wrap-around addressing scheme of the interpreter.
@@ -1541,6 +1737,17 @@
         }
         pw.decreaseIndent();
 
+        pw.println("Keepalive filter:");
+        pw.increaseIndent();
+        for (int i = 0; i < mKeepaliveAcks.size(); ++i) {
+            final TcpKeepaliveAck keepaliveAck = mKeepaliveAcks.valueAt(i);
+            pw.print("Slot ");
+            pw.print(mKeepaliveAcks.keyAt(i));
+            pw.print(" : ");
+            pw.println(keepaliveAck);
+        }
+        pw.decreaseIndent();
+
         if (DBG) {
             pw.println("Last program:");
             pw.increaseIndent();
diff --git a/packages/NetworkStack/src/android/net/apf/ApfGenerator.java b/packages/NetworkStack/src/android/net/apf/ApfGenerator.java
index 87a1b5e..809327a 100644
--- a/packages/NetworkStack/src/android/net/apf/ApfGenerator.java
+++ b/packages/NetworkStack/src/android/net/apf/ApfGenerator.java
@@ -476,7 +476,7 @@
 
     /**
      * Add an instruction to the end of the program to load 16-bits from the packet into
-     * {@code register}. The offset of the loaded 16-bits from the begining of the packet is
+     * {@code register}. The offset of the loaded 16-bits from the beginning of the packet is
      * the sum of {@code offset} and the value in register R1.
      */
     public ApfGenerator addLoad16Indexed(Register register, int offset) {
@@ -488,7 +488,7 @@
 
     /**
      * Add an instruction to the end of the program to load 32-bits from the packet into
-     * {@code register}. The offset of the loaded 32-bits from the begining of the packet is
+     * {@code register}. The offset of the loaded 32-bits from the beginning of the packet is
      * the sum of {@code offset} and the value in register R1.
      */
     public ApfGenerator addLoad32Indexed(Register register, int offset) {
diff --git a/packages/NetworkStack/src/android/net/ip/IpClient.java b/packages/NetworkStack/src/android/net/ip/IpClient.java
index 12fe8c5..9e59912 100644
--- a/packages/NetworkStack/src/android/net/ip/IpClient.java
+++ b/packages/NetworkStack/src/android/net/ip/IpClient.java
@@ -23,6 +23,7 @@
 
 import static com.android.server.util.PermissionUtil.checkNetworkStackCallingPermission;
 
+import android.annotation.NonNull;
 import android.content.Context;
 import android.net.ConnectivityManager;
 import android.net.DhcpResults;
@@ -34,6 +35,7 @@
 import android.net.ProxyInfo;
 import android.net.ProxyInfoParcelable;
 import android.net.RouteInfo;
+import android.net.TcpKeepalivePacketDataParcelable;
 import android.net.apf.ApfCapabilities;
 import android.net.apf.ApfFilter;
 import android.net.dhcp.DhcpClient;
@@ -292,6 +294,8 @@
     private static final int EVENT_PROVISIONING_TIMEOUT           = 10;
     private static final int EVENT_DHCPACTION_TIMEOUT             = 11;
     private static final int EVENT_READ_PACKET_FILTER_COMPLETE    = 12;
+    private static final int CMD_ADD_KEEPALIVE_PACKET_FILTER_TO_APF = 13;
+    private static final int CMD_REMOVE_KEEPALIVE_PACKET_FILTER_FROM_APF = 14;
 
     // Internal commands to use instead of trying to call transitionTo() inside
     // a given State's enter() method. Calling transitionTo() from enter/exit
@@ -522,6 +526,16 @@
             checkNetworkStackCallingPermission();
             IpClient.this.setMulticastFilter(enabled);
         }
+        @Override
+        public void addKeepalivePacketFilter(int slot, TcpKeepalivePacketDataParcelable pkt) {
+            checkNetworkStackCallingPermission();
+            IpClient.this.addKeepalivePacketFilter(slot, pkt);
+        }
+        @Override
+        public void removeKeepalivePacketFilter(int slot) {
+            checkNetworkStackCallingPermission();
+            IpClient.this.removeKeepalivePacketFilter(slot);
+        }
     }
 
     public String getInterfaceName() {
@@ -644,6 +658,22 @@
     }
 
     /**
+     * Called by WifiStateMachine to add keepalive packet filter before setting up
+     * keepalive offload.
+     */
+    public void addKeepalivePacketFilter(int slot, @NonNull TcpKeepalivePacketDataParcelable pkt) {
+        sendMessage(CMD_ADD_KEEPALIVE_PACKET_FILTER_TO_APF, slot, 0 /* Unused */, pkt);
+    }
+
+    /**
+     * Called by WifiStateMachine to remove keepalive packet filter after stopping keepalive
+     * offload.
+     */
+    public void removeKeepalivePacketFilter(int slot) {
+        sendMessage(CMD_REMOVE_KEEPALIVE_PACKET_FILTER_FROM_APF, slot, 0 /* Unused */);
+    }
+
+    /**
      * Dump logs of this IpClient.
      */
     public void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
@@ -1512,6 +1542,23 @@
                     break;
                 }
 
+                case CMD_ADD_KEEPALIVE_PACKET_FILTER_TO_APF: {
+                    final int slot = msg.arg1;
+                    if (mApfFilter != null) {
+                        mApfFilter.addKeepalivePacketFilter(slot,
+                                (TcpKeepalivePacketDataParcelable) msg.obj);
+                    }
+                    break;
+                }
+
+                case CMD_REMOVE_KEEPALIVE_PACKET_FILTER_FROM_APF: {
+                    final int slot = msg.arg1;
+                    if (mApfFilter != null) {
+                        mApfFilter.removeKeepalivePacketFilter(slot);
+                    }
+                    break;
+                }
+
                 case EVENT_DHCPACTION_TIMEOUT:
                     stopDhcpAction();
                     break;
diff --git a/packages/NetworkStack/tests/Android.bp b/packages/NetworkStack/tests/Android.bp
index 45fa2dc..4a09b3e 100644
--- a/packages/NetworkStack/tests/Android.bp
+++ b/packages/NetworkStack/tests/Android.bp
@@ -49,6 +49,7 @@
         "libhidlbase",
         "libhidltransport",
         "libhwbinder",
+        "libjsoncpp",
         "liblog",
         "liblzma",
         "libnativehelper",
diff --git a/packages/NetworkStack/tests/src/android/net/apf/ApfTest.java b/packages/NetworkStack/tests/src/android/net/apf/ApfTest.java
index f76e412..a4a1000 100644
--- a/packages/NetworkStack/tests/src/android/net/apf/ApfTest.java
+++ b/packages/NetworkStack/tests/src/android/net/apf/ApfTest.java
@@ -39,13 +39,14 @@
 import android.content.Context;
 import android.net.LinkAddress;
 import android.net.LinkProperties;
+import android.net.SocketKeepalive;
+import android.net.TcpKeepalivePacketData;
+import android.net.TcpKeepalivePacketData.TcpSocketInfo;
 import android.net.apf.ApfFilter.ApfConfiguration;
 import android.net.apf.ApfGenerator.IllegalInstructionException;
 import android.net.apf.ApfGenerator.Register;
 import android.net.ip.IIpClientCallbacks;
-import android.net.ip.IpClient;
 import android.net.ip.IpClient.IpClientCallbacksWrapper;
-import android.net.ip.IpClientCallbacks;
 import android.net.metrics.IpConnectivityLog;
 import android.net.metrics.RaEvent;
 import android.net.util.InterfaceParams;
@@ -1003,15 +1004,31 @@
     private static final byte[] ETH_BROADCAST_MAC_ADDRESS =
             {(byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff };
 
+    private static final int IPV4_HEADER_LEN = 20;
     private static final int IPV4_VERSION_IHL_OFFSET = ETH_HEADER_LEN + 0;
+    private static final int IPV4_TOTAL_LENGTH_OFFSET  = ETH_HEADER_LEN + 2;
     private static final int IPV4_PROTOCOL_OFFSET = ETH_HEADER_LEN + 9;
+    private static final int IPV4_SRC_ADDR_OFFSET = ETH_HEADER_LEN + 12;
     private static final int IPV4_DEST_ADDR_OFFSET = ETH_HEADER_LEN + 16;
+    private static final int IPV4_TCP_HEADER_LEN = 20;
+    private static final int IPV4_TCP_HEADER_OFFSET = ETH_HEADER_LEN + IPV4_HEADER_LEN;
+    private static final int IPV4_TCP_SRC_PORT_OFFSET = IPV4_TCP_HEADER_OFFSET + 0;
+    private static final int IPV4_TCP_DEST_PORT_OFFSET = IPV4_TCP_HEADER_OFFSET + 2;
+    private static final int IPV4_TCP_SEQ_NUM_OFFSET = IPV4_TCP_HEADER_OFFSET + 4;
+    private static final int IPV4_TCP_ACK_NUM_OFFSET = IPV4_TCP_HEADER_OFFSET + 8;
+    private static final int IPV4_TCP_HEADER_LENGTH_OFFSET = IPV4_TCP_HEADER_OFFSET + 12;
     private static final byte[] IPV4_BROADCAST_ADDRESS =
             {(byte) 255, (byte) 255, (byte) 255, (byte) 255};
 
     private static final int IPV6_NEXT_HEADER_OFFSET = ETH_HEADER_LEN + 6;
     private static final int IPV6_HEADER_LEN = 40;
+    private static final int IPV6_SRC_ADDR_OFFSET = ETH_HEADER_LEN + 8;
     private static final int IPV6_DEST_ADDR_OFFSET = ETH_HEADER_LEN + 24;
+    private static final int IPV6_TCP_HEADER_OFFSET = ETH_HEADER_LEN + IPV6_HEADER_LEN;
+    private static final int IPV6_TCP_SRC_PORT_OFFSET = IPV6_TCP_HEADER_OFFSET + 0;
+    private static final int IPV6_TCP_DEST_PORT_OFFSET = IPV6_TCP_HEADER_OFFSET + 2;
+    private static final int IPV6_TCP_SEQ_NUM_OFFSET = IPV6_TCP_HEADER_OFFSET + 4;
+    private static final int IPV6_TCP_ACK_NUM_OFFSET = IPV6_TCP_HEADER_OFFSET + 8;
     // The IPv6 all nodes address ff02::1
     private static final byte[] IPV6_ALL_NODES_ADDRESS =
             { (byte) 0xff, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 };
@@ -1491,6 +1508,200 @@
         return packet.array();
     }
 
+    private static final byte[] IPV4_KEEPALIVE_SRC_ADDR = {10, 0, 0, 5};
+    private static final byte[] IPV4_KEEPALIVE_DST_ADDR = {10, 0, 0, 6};
+    private static final byte[] IPV4_ANOTHER_ADDR = {10, 0 , 0, 7};
+    private static final byte[] IPV6_KEEPALIVE_SRC_ADDR =
+            {(byte) 0x24, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (byte) 0xfa, (byte) 0xf1};
+    private static final byte[] IPV6_KEEPALIVE_DST_ADDR =
+            {(byte) 0x24, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (byte) 0xfa, (byte) 0xf2};
+    private static final byte[] IPV6_ANOTHER_ADDR =
+            {(byte) 0x24, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (byte) 0xfa, (byte) 0xf5};
+
+    @Test
+    public void testApfFilterKeepaliveAck() throws Exception {
+        final MockIpClientCallback cb = new MockIpClientCallback();
+        final ApfConfiguration config = getDefaultConfig();
+        config.multicastFilter = DROP_MULTICAST;
+        config.ieee802_3Filter = DROP_802_3_FRAMES;
+        final TestApfFilter apfFilter = new TestApfFilter(mContext, config, cb, mLog);
+        byte[] program;
+        final int srcPort = 12345;
+        final int dstPort = 54321;
+        final int seqNum = 2123456789;
+        final int ackNum = 1234567890;
+        final int anotherSrcPort = 23456;
+        final int anotherDstPort = 65432;
+        final int anotherSeqNum = 2123456780;
+        final int anotherAckNum = 1123456789;
+        final int slot1 = 1;
+        final int slot2 = 2;
+        final int window = 14480;
+        final int windowScale = 4;
+
+        // src: 10.0.0.5, port: 12345
+        // dst: 10.0.0.6, port: 54321
+        InetAddress srcAddr = InetAddress.getByAddress(IPV4_KEEPALIVE_SRC_ADDR);
+        InetAddress dstAddr = InetAddress.getByAddress(IPV4_KEEPALIVE_DST_ADDR);
+
+        final TcpSocketInfo v4Tsi = new TcpSocketInfo(
+                srcAddr, srcPort, dstAddr, dstPort, seqNum, ackNum, window, windowScale);
+        final TcpKeepalivePacketData ipv4TcpKeepalivePacket =
+                TcpKeepalivePacketData.tcpKeepalivePacket(v4Tsi);
+
+        apfFilter.addKeepalivePacketFilter(slot1, ipv4TcpKeepalivePacket.toStableParcelable());
+        program = cb.getApfProgram();
+
+        // Verify IPv4 keepalive ack packet is dropped
+        // src: 10.0.0.6, port: 54321
+        // dst: 10.0.0.5, port: 12345
+        assertDrop(program,
+                ipv4Packet(IPV4_KEEPALIVE_DST_ADDR, IPV4_KEEPALIVE_SRC_ADDR,
+                        dstPort, srcPort, ackNum, seqNum + 1, 0 /* dataLength */));
+        // Verify IPv4 non-keepalive ack packet from the same source address is passed
+        assertPass(program,
+                ipv4Packet(IPV4_KEEPALIVE_DST_ADDR, IPV4_KEEPALIVE_SRC_ADDR,
+                        dstPort, srcPort, ackNum + 100, seqNum, 0 /* dataLength */));
+        assertPass(program,
+                ipv4Packet(IPV4_KEEPALIVE_DST_ADDR, IPV4_KEEPALIVE_SRC_ADDR,
+                        dstPort, srcPort, ackNum, seqNum + 1, 10 /* dataLength */));
+        // Verify IPv4 packet from another address is passed
+        assertPass(program,
+                ipv4Packet(IPV4_ANOTHER_ADDR, IPV4_KEEPALIVE_SRC_ADDR, anotherSrcPort,
+                        anotherDstPort, anotherSeqNum, anotherAckNum));
+
+        // Remove IPv4 keepalive filter
+        apfFilter.removeKeepalivePacketFilter(slot1);
+
+        try {
+            // src: 2404:0:0:0:0:0:faf1, port: 12345
+            // dst: 2404:0:0:0:0:0:faf2, port: 54321
+            srcAddr = InetAddress.getByAddress(IPV6_KEEPALIVE_SRC_ADDR);
+            dstAddr = InetAddress.getByAddress(IPV6_KEEPALIVE_DST_ADDR);
+            final TcpSocketInfo v6Tsi = new TcpSocketInfo(
+                    srcAddr, srcPort, dstAddr, dstPort, seqNum, ackNum, window, windowScale);
+            final TcpKeepalivePacketData ipv6TcpKeepalivePacket =
+                    TcpKeepalivePacketData.tcpKeepalivePacket(v6Tsi);
+            apfFilter.addKeepalivePacketFilter(slot1, ipv6TcpKeepalivePacket.toStableParcelable());
+            program = cb.getApfProgram();
+
+            // Verify IPv6 keepalive ack packet is dropped
+            // src: 2404:0:0:0:0:0:faf2, port: 54321
+            // dst: 2404:0:0:0:0:0:faf1, port: 12345
+            assertDrop(program,
+                    ipv6Packet(IPV6_KEEPALIVE_DST_ADDR, IPV6_KEEPALIVE_SRC_ADDR,
+                            dstPort, srcPort, ackNum, seqNum + 1));
+            // Verify IPv6 non-keepalive ack packet from the same source address is passed
+            assertPass(program,
+                    ipv6Packet(IPV6_KEEPALIVE_DST_ADDR, IPV6_KEEPALIVE_SRC_ADDR,
+                            dstPort, srcPort, ackNum + 100, seqNum));
+            // Verify IPv6 packet from another address is passed
+            assertPass(program,
+                    ipv6Packet(IPV6_ANOTHER_ADDR, IPV6_KEEPALIVE_SRC_ADDR, anotherSrcPort,
+                            anotherDstPort, anotherSeqNum, anotherAckNum));
+
+            // Remove IPv6 keepalive filter
+            apfFilter.removeKeepalivePacketFilter(slot1);
+
+            // Verify multiple filters
+            apfFilter.addKeepalivePacketFilter(slot1, ipv4TcpKeepalivePacket.toStableParcelable());
+            apfFilter.addKeepalivePacketFilter(slot2, ipv6TcpKeepalivePacket.toStableParcelable());
+            program = cb.getApfProgram();
+
+            // Verify IPv4 keepalive ack packet is dropped
+            // src: 10.0.0.6, port: 54321
+            // dst: 10.0.0.5, port: 12345
+            assertDrop(program,
+                    ipv4Packet(IPV4_KEEPALIVE_DST_ADDR, IPV4_KEEPALIVE_SRC_ADDR,
+                            dstPort, srcPort, ackNum, seqNum + 1));
+            // Verify IPv4 non-keepalive ack packet from the same source address is passed
+            assertPass(program,
+                    ipv4Packet(IPV4_KEEPALIVE_DST_ADDR, IPV4_KEEPALIVE_SRC_ADDR,
+                            dstPort, srcPort, ackNum + 100, seqNum));
+            // Verify IPv4 packet from another address is passed
+            assertPass(program,
+                    ipv4Packet(IPV4_ANOTHER_ADDR, IPV4_KEEPALIVE_SRC_ADDR, anotherSrcPort,
+                            anotherDstPort, anotherSeqNum, anotherAckNum));
+
+            // Verify IPv6 keepalive ack packet is dropped
+            // src: 2404:0:0:0:0:0:faf2, port: 54321
+            // dst: 2404:0:0:0:0:0:faf1, port: 12345
+            assertDrop(program,
+                    ipv6Packet(IPV6_KEEPALIVE_DST_ADDR, IPV6_KEEPALIVE_SRC_ADDR,
+                            dstPort, srcPort, ackNum, seqNum + 1));
+            // Verify IPv6 non-keepalive ack packet from the same source address is passed
+            assertPass(program,
+                    ipv6Packet(IPV6_KEEPALIVE_DST_ADDR, IPV6_KEEPALIVE_SRC_ADDR,
+                            dstPort, srcPort, ackNum + 100, seqNum));
+            // Verify IPv6 packet from another address is passed
+            assertPass(program,
+                    ipv6Packet(IPV6_ANOTHER_ADDR, IPV6_KEEPALIVE_SRC_ADDR, anotherSrcPort,
+                            anotherDstPort, anotherSeqNum, anotherAckNum));
+
+            // Remove keepalive filters
+            apfFilter.removeKeepalivePacketFilter(slot1);
+            apfFilter.removeKeepalivePacketFilter(slot2);
+        } catch (SocketKeepalive.InvalidPacketException e) {
+            // TODO: support V6 packets
+        }
+
+        program = cb.getApfProgram();
+
+        // Verify IPv4, IPv6 packets are passed
+        assertPass(program,
+                ipv4Packet(IPV4_KEEPALIVE_DST_ADDR, IPV4_KEEPALIVE_SRC_ADDR,
+                        dstPort, srcPort, ackNum, seqNum + 1));
+        assertPass(program,
+                ipv6Packet(IPV6_KEEPALIVE_DST_ADDR, IPV6_KEEPALIVE_SRC_ADDR,
+                        dstPort, srcPort, ackNum, seqNum + 1));
+        assertPass(program,
+                ipv4Packet(IPV4_ANOTHER_ADDR, IPV4_KEEPALIVE_SRC_ADDR, srcPort,
+                        dstPort, anotherSeqNum, anotherAckNum));
+        assertPass(program,
+                ipv6Packet(IPV6_ANOTHER_ADDR, IPV6_KEEPALIVE_SRC_ADDR, srcPort,
+                        dstPort, anotherSeqNum, anotherAckNum));
+
+        apfFilter.shutdown();
+    }
+
+    private static byte[] ipv4Packet(byte[] sip, byte[] tip, int sport,
+            int dport, int seq, int ack) {
+        ByteBuffer packet = ByteBuffer.wrap(new byte[100]);
+        packet.putShort(ETH_ETHERTYPE_OFFSET, (short) ETH_P_IP);
+        packet.put(IPV4_VERSION_IHL_OFFSET, (byte) 0x45);
+        put(packet, IPV4_SRC_ADDR_OFFSET, sip);
+        put(packet, IPV4_DEST_ADDR_OFFSET, tip);
+        packet.putShort(IPV4_TCP_SRC_PORT_OFFSET, (short) sport);
+        packet.putShort(IPV4_TCP_DEST_PORT_OFFSET, (short) dport);
+        packet.putInt(IPV4_TCP_SEQ_NUM_OFFSET, seq);
+        packet.putInt(IPV4_TCP_ACK_NUM_OFFSET, ack);
+        return packet.array();
+    }
+
+    private static byte[] ipv4Packet(byte[] sip, byte[] tip, int sport,
+            int dport, int seq, int ack, int dataLength) {
+        final int totalLength = dataLength + IPV4_HEADER_LEN + IPV4_TCP_HEADER_LEN;
+
+        ByteBuffer packet = ByteBuffer.wrap(ipv4Packet(sip, tip, sport, dport, seq, ack));
+        packet.putShort(IPV4_TOTAL_LENGTH_OFFSET, (short) totalLength);
+        // TCP header length 5, reserved 3 bits, NS=0
+        packet.put(IPV4_TCP_HEADER_LENGTH_OFFSET, (byte) 0x50);
+        return packet.array();
+    }
+
+    private static byte[] ipv6Packet(byte[] sip, byte[] tip, int sport,
+            int dport, int seq, int ack) {
+        ByteBuffer packet = ByteBuffer.wrap(new byte[100]);
+        packet.putShort(ETH_ETHERTYPE_OFFSET, (short) ETH_P_IPV6);
+        put(packet, IPV6_SRC_ADDR_OFFSET, sip);
+        put(packet, IPV6_DEST_ADDR_OFFSET, tip);
+        packet.putShort(IPV6_TCP_SRC_PORT_OFFSET, (short) sport);
+        packet.putShort(IPV6_TCP_DEST_PORT_OFFSET, (short) dport);
+        packet.putInt(IPV6_TCP_SEQ_NUM_OFFSET, seq);
+        packet.putInt(IPV6_TCP_ACK_NUM_OFFSET, ack);
+        return packet.array();
+    }
+
     // Verify that the last program pushed to the IpClient.Callback properly filters the
     // given packet for the given lifetime.
     private void verifyRaLifetime(byte[] program, ByteBuffer packet, int lifetime) {
diff --git a/packages/SettingsLib/res/values/strings.xml b/packages/SettingsLib/res/values/strings.xml
index 76a216d..23e13c2 100644
--- a/packages/SettingsLib/res/values/strings.xml
+++ b/packages/SettingsLib/res/values/strings.xml
@@ -191,9 +191,9 @@
     <string name="bluetooth_profile_a2dp_high_quality_unknown_codec">HD audio</string>
 
     <!-- Bluetooth settings.  The user-visible string that is used whenever referring to the Hearing Aid profile. -->
-    <string name="bluetooth_profile_hearing_aid">Hearing Aid</string>
+    <string name="bluetooth_profile_hearing_aid">Hearing Aids</string>
     <!-- Bluetooth settings.  Connection options screen.  The summary for the Hearing Aid checkbox preference when Hearing Aid is connected. -->
-    <string name="bluetooth_hearing_aid_profile_summary_connected">Connected to Hearing Aid</string>
+    <string name="bluetooth_hearing_aid_profile_summary_connected">Connected to Hearing Aids</string>
 
     <!-- Bluetooth settings.  Connection options screen.  The summary for the A2DP checkbox preference when A2DP is connected. -->
     <string name="bluetooth_a2dp_profile_summary_connected">Connected to media audio</string>
@@ -233,7 +233,7 @@
          will set the HID profile as preferred. -->
     <string name="bluetooth_hid_profile_summary_use_for">Use for input</string>
     <!-- Bluetooth settings.  Connection options screen.  The summary for the Hearing Aid checkbox preference that describes how checking it will set the Hearing Aid profile as preferred. -->
-    <string name="bluetooth_hearing_aid_profile_summary_use_for">Use for Hearing Aid</string>
+    <string name="bluetooth_hearing_aid_profile_summary_use_for">Use for Hearing Aids</string>
 
     <!-- Button text for accepting an incoming pairing request. [CHAR LIMIT=20] -->
     <string name="bluetooth_pairing_accept">Pair</string>
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 08e4903..253bdb3 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -60,7 +60,6 @@
 import android.database.ContentObserver;
 import android.net.ConnectionInfo;
 import android.net.ConnectivityManager;
-import android.net.ConnectivityManager.PacketKeepalive;
 import android.net.IConnectivityManager;
 import android.net.IIpConnectivityMetrics;
 import android.net.INetd;
@@ -93,6 +92,7 @@
 import android.net.PrivateDnsConfigParcel;
 import android.net.ProxyInfo;
 import android.net.RouteInfo;
+import android.net.SocketKeepalive;
 import android.net.UidRange;
 import android.net.Uri;
 import android.net.VpnService;
@@ -2487,8 +2487,8 @@
                     nai.networkMisc.acceptUnvalidated = msg.arg1 == 1;
                     break;
                 }
-                case NetworkAgent.EVENT_PACKET_KEEPALIVE: {
-                    mKeepaliveTracker.handleEventPacketKeepalive(nai, msg);
+                case NetworkAgent.EVENT_SOCKET_KEEPALIVE: {
+                    mKeepaliveTracker.handleEventSocketKeepalive(nai, msg);
                     break;
                 }
             }
@@ -2853,8 +2853,7 @@
         // sending all CALLBACK_LOST messages (for requests, not listens) at the end
         // of rematchAllNetworksAndRequests
         notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST);
-        mKeepaliveTracker.handleStopAllKeepalives(nai,
-                ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK);
+        mKeepaliveTracker.handleStopAllKeepalives(nai, SocketKeepalive.ERROR_INVALID_NETWORK);
         for (String iface : nai.linkProperties.getAllInterfaceNames()) {
             // Disable wakeup packet monitoring for each interface.
             wakeupModifyInterface(iface, nai.networkCapabilities, false);
@@ -3446,12 +3445,12 @@
                     break;
                 }
                 // Sent by KeepaliveTracker to process an app request on the state machine thread.
-                case NetworkAgent.CMD_START_PACKET_KEEPALIVE: {
+                case NetworkAgent.CMD_START_SOCKET_KEEPALIVE: {
                     mKeepaliveTracker.handleStartKeepalive(msg);
                     break;
                 }
                 // Sent by KeepaliveTracker to process an app request on the state machine thread.
-                case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: {
+                case NetworkAgent.CMD_STOP_SOCKET_KEEPALIVE: {
                     NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj);
                     int slot = msg.arg1;
                     int reason = msg.arg2;
@@ -6315,7 +6314,7 @@
         mKeepaliveTracker.startNattKeepalive(
                 getNetworkAgentInfoForNetwork(network),
                 intervalSeconds, messenger, binder,
-                srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT);
+                srcAddr, srcPort, dstAddr, NattSocketKeepalive.NATT_PORT);
     }
 
     @Override
@@ -6330,9 +6329,17 @@
     }
 
     @Override
+    public void startTcpKeepalive(Network network, FileDescriptor fd, int intervalSeconds,
+            Messenger messenger, IBinder binder) {
+        enforceKeepalivePermission();
+        mKeepaliveTracker.startTcpKeepalive(
+                getNetworkAgentInfoForNetwork(network), fd, intervalSeconds, messenger, binder);
+    }
+
+    @Override
     public void stopKeepalive(Network network, int slot) {
         mHandler.sendMessage(mHandler.obtainMessage(
-                NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network));
+                NetworkAgent.CMD_STOP_SOCKET_KEEPALIVE, slot, SocketKeepalive.SUCCESS, network));
     }
 
     @Override
diff --git a/services/core/java/com/android/server/connectivity/KeepaliveTracker.java b/services/core/java/com/android/server/connectivity/KeepaliveTracker.java
index 1559ba8..6cff57d 100644
--- a/services/core/java/com/android/server/connectivity/KeepaliveTracker.java
+++ b/services/core/java/com/android/server/connectivity/KeepaliveTracker.java
@@ -16,26 +16,32 @@
 
 package com.android.server.connectivity;
 
-// TODO: Clean up imports and remove references of PacketKeepalive constants.
-
-import static android.net.ConnectivityManager.PacketKeepalive.ERROR_INVALID_INTERVAL;
-import static android.net.ConnectivityManager.PacketKeepalive.ERROR_INVALID_IP_ADDRESS;
-import static android.net.ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK;
-import static android.net.ConnectivityManager.PacketKeepalive.MIN_INTERVAL;
-import static android.net.ConnectivityManager.PacketKeepalive.NATT_PORT;
-import static android.net.ConnectivityManager.PacketKeepalive.NO_KEEPALIVE;
-import static android.net.ConnectivityManager.PacketKeepalive.SUCCESS;
-import static android.net.NetworkAgent.CMD_START_PACKET_KEEPALIVE;
-import static android.net.NetworkAgent.CMD_STOP_PACKET_KEEPALIVE;
-import static android.net.NetworkAgent.EVENT_PACKET_KEEPALIVE;
+import static android.net.NattSocketKeepalive.NATT_PORT;
+import static android.net.NetworkAgent.CMD_ADD_KEEPALIVE_PACKET_FILTER;
+import static android.net.NetworkAgent.CMD_REMOVE_KEEPALIVE_PACKET_FILTER;
+import static android.net.NetworkAgent.CMD_START_SOCKET_KEEPALIVE;
+import static android.net.NetworkAgent.CMD_STOP_SOCKET_KEEPALIVE;
+import static android.net.NetworkAgent.EVENT_SOCKET_KEEPALIVE;
+import static android.net.SocketKeepalive.BINDER_DIED;
+import static android.net.SocketKeepalive.ERROR_INVALID_INTERVAL;
+import static android.net.SocketKeepalive.ERROR_INVALID_IP_ADDRESS;
+import static android.net.SocketKeepalive.ERROR_INVALID_NETWORK;
 import static android.net.SocketKeepalive.ERROR_INVALID_SOCKET;
+import static android.net.SocketKeepalive.MAX_INTERVAL_SEC;
+import static android.net.SocketKeepalive.MIN_INTERVAL_SEC;
+import static android.net.SocketKeepalive.NO_KEEPALIVE;
+import static android.net.SocketKeepalive.SUCCESS;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.net.ConnectivityManager.PacketKeepalive;
 import android.net.KeepalivePacketData;
+import android.net.NattKeepalivePacketData;
 import android.net.NetworkAgent;
 import android.net.NetworkUtils;
+import android.net.SocketKeepalive.InvalidPacketException;
+import android.net.SocketKeepalive.InvalidSocketException;
+import android.net.TcpKeepalivePacketData;
+import android.net.TcpKeepalivePacketData.TcpSocketInfo;
 import android.net.util.IpUtils;
 import android.os.Binder;
 import android.os.Handler;
@@ -60,11 +66,11 @@
 import java.util.HashMap;
 
 /**
- * Manages packet keepalive requests.
+ * Manages socket keepalive requests.
  *
  * Provides methods to stop and start keepalive requests, and keeps track of keepalives across all
  * networks. This class is tightly coupled to ConnectivityService. It is not thread-safe and its
- * methods must be called only from the ConnectivityService handler thread.
+ * handle* methods must be called only from the ConnectivityService handler thread.
  */
 public class KeepaliveTracker {
 
@@ -77,38 +83,54 @@
     private final HashMap <NetworkAgentInfo, HashMap<Integer, KeepaliveInfo>> mKeepalives =
             new HashMap<> ();
     private final Handler mConnectivityServiceHandler;
+    @NonNull
+    private final TcpKeepaliveController mTcpController;
 
     public KeepaliveTracker(Handler handler) {
         mConnectivityServiceHandler = handler;
+        mTcpController = new TcpKeepaliveController(handler);
     }
 
     /**
-     * Tracks information about a packet keepalive.
+     * Tracks information about a socket keepalive.
      *
      * All information about this keepalive is known at construction time except the slot number,
      * which is only returned when the hardware has successfully started the keepalive.
      */
     class KeepaliveInfo implements IBinder.DeathRecipient {
-        // Bookkeping data.
+        // Bookkeeping data.
         private final Messenger mMessenger;
         private final IBinder mBinder;
         private final int mUid;
         private final int mPid;
         private final NetworkAgentInfo mNai;
+        private final int mType;
+        private final FileDescriptor mFd;
 
-        /** Keepalive slot. A small integer that identifies this keepalive among the ones handled
-          * by this network. */
-        private int mSlot = PacketKeepalive.NO_KEEPALIVE;
+        public static final int TYPE_NATT = 1;
+        public static final int TYPE_TCP = 2;
+
+        // Keepalive slot. A small integer that identifies this keepalive among the ones handled
+        // by this network.
+        private int mSlot = NO_KEEPALIVE;
 
         // Packet data.
         private final KeepalivePacketData mPacket;
         private final int mInterval;
 
-        // Whether the keepalive is started or not.
-        public boolean isStarted;
+        // Whether the keepalive is started or not. The initial state is NOT_STARTED.
+        private static final int NOT_STARTED = 1;
+        private static final int STARTING = 2;
+        private static final int STARTED = 3;
+        private int mStartedState = NOT_STARTED;
 
-        public KeepaliveInfo(Messenger messenger, IBinder binder, NetworkAgentInfo nai,
-                KeepalivePacketData packet, int interval) {
+        KeepaliveInfo(@NonNull Messenger messenger,
+                @NonNull IBinder binder,
+                @NonNull NetworkAgentInfo nai,
+                @NonNull KeepalivePacketData packet,
+                int interval,
+                int type,
+                @NonNull FileDescriptor fd) {
             mMessenger = messenger;
             mBinder = binder;
             mPid = Binder.getCallingPid();
@@ -117,6 +139,8 @@
             mNai = nai;
             mPacket = packet;
             mInterval = interval;
+            mType = type;
+            mFd = fd;
 
             try {
                 mBinder.linkToDeath(this, 0);
@@ -129,32 +153,40 @@
             return mNai;
         }
 
-        public String toString() {
-            return new StringBuffer("KeepaliveInfo [")
-                    .append(" network=").append(mNai.network)
-                    .append(" isStarted=").append(isStarted)
-                    .append(" ")
-                    .append(IpUtils.addressAndPortToString(mPacket.srcAddress, mPacket.srcPort))
-                    .append("->")
-                    .append(IpUtils.addressAndPortToString(mPacket.dstAddress, mPacket.dstPort))
-                    .append(" interval=" + mInterval)
-                    .append(" packetData=" + HexDump.toHexString(mPacket.getPacket()))
-                    .append(" uid=").append(mUid).append(" pid=").append(mPid)
-                    .append(" ]")
-                    .toString();
+        private String startedStateString(final int state) {
+            switch (state) {
+                case NOT_STARTED : return "NOT_STARTED";
+                case STARTING : return "STARTING";
+                case STARTED : return "STARTED";
+            }
+            throw new IllegalArgumentException("Unknown state");
         }
 
-        /** Sends a message back to the application via its PacketKeepalive.Callback. */
+        public String toString() {
+            return "KeepaliveInfo ["
+                    + " network=" + mNai.network
+                    + " startedState=" + startedStateString(mStartedState)
+                    + " "
+                    + IpUtils.addressAndPortToString(mPacket.srcAddress, mPacket.srcPort)
+                    + "->"
+                    + IpUtils.addressAndPortToString(mPacket.dstAddress, mPacket.dstPort)
+                    + " interval=" + mInterval
+                    + " uid=" + mUid + " pid=" + mPid
+                    + " packetData=" + HexDump.toHexString(mPacket.getPacket())
+                    + " ]";
+        }
+
+        /** Sends a message back to the application via its SocketKeepalive.Callback. */
         void notifyMessenger(int slot, int err) {
+            if (DBG) {
+                Log.d(TAG, "notify keepalive " + mSlot + " on " + mNai.network + " for " + err);
+            }
             KeepaliveTracker.this.notifyMessenger(mMessenger, slot, err);
         }
 
         /** Called when the application process is killed. */
         public void binderDied() {
-            // Not called from ConnectivityService handler thread, so send it a message.
-            mConnectivityServiceHandler.obtainMessage(
-                    NetworkAgent.CMD_STOP_PACKET_KEEPALIVE,
-                    mSlot, PacketKeepalive.BINDER_DIED, mNai.network).sendToTarget();
+            stop(BINDER_DIED);
         }
 
         void unlinkDeathRecipient() {
@@ -181,7 +213,10 @@
         }
 
         private int checkInterval() {
-            return mInterval >= MIN_INTERVAL ? SUCCESS : ERROR_INVALID_INTERVAL;
+            if (mInterval < MIN_INTERVAL_SEC || mInterval > MAX_INTERVAL_SEC) {
+                return ERROR_INVALID_INTERVAL;
+            }
+            return SUCCESS;
         }
 
         private int isValid() {
@@ -198,7 +233,26 @@
             int error = isValid();
             if (error == SUCCESS) {
                 Log.d(TAG, "Starting keepalive " + mSlot + " on " + mNai.name());
-                mNai.asyncChannel.sendMessage(CMD_START_PACKET_KEEPALIVE, slot, mInterval, mPacket);
+                switch (mType) {
+                    case TYPE_NATT:
+                        mNai.asyncChannel
+                                .sendMessage(CMD_START_SOCKET_KEEPALIVE, slot, mInterval, mPacket);
+                        break;
+                    case TYPE_TCP:
+                        mTcpController.startSocketMonitor(mFd, this, mSlot);
+                        mNai.asyncChannel
+                                .sendMessage(CMD_ADD_KEEPALIVE_PACKET_FILTER, slot, 0 /* Unused */,
+                                        mPacket);
+                        // TODO: check result from apf and notify of failure as needed.
+                        mNai.asyncChannel
+                                .sendMessage(CMD_START_SOCKET_KEEPALIVE, slot, mInterval, mPacket);
+                        break;
+                    default:
+                        Log.wtf(TAG, "Starting keepalive with unknown type: " + mType);
+                        handleStopKeepalive(mNai, mSlot, error);
+                        return;
+                }
+                mStartedState = STARTING;
             } else {
                 handleStopKeepalive(mNai, mSlot, error);
                 return;
@@ -212,20 +266,32 @@
                     Log.e(TAG, "Cannot stop unowned keepalive " + mSlot + " on " + mNai.network);
                 }
             }
-            if (isStarted) {
+            if (NOT_STARTED != mStartedState) {
                 Log.d(TAG, "Stopping keepalive " + mSlot + " on " + mNai.name());
-                mNai.asyncChannel.sendMessage(CMD_STOP_PACKET_KEEPALIVE, mSlot);
+                if (mType == TYPE_NATT) {
+                    mNai.asyncChannel.sendMessage(CMD_STOP_SOCKET_KEEPALIVE, mSlot);
+                } else if (mType == TYPE_TCP) {
+                    mNai.asyncChannel.sendMessage(CMD_STOP_SOCKET_KEEPALIVE, mSlot);
+                    mNai.asyncChannel.sendMessage(CMD_REMOVE_KEEPALIVE_PACKET_FILTER, mSlot);
+                    mTcpController.stopSocketMonitor(mSlot);
+                } else {
+                    Log.wtf(TAG, "Stopping keepalive with unknown type: " + mType);
+                }
             }
             // TODO: at the moment we unconditionally return failure here. In cases where the
             // NetworkAgent is alive, should we ask it to reply, so it can return failure?
             notifyMessenger(mSlot, reason);
             unlinkDeathRecipient();
         }
+
+        void onFileDescriptorInitiatedStop(final int socketKeepaliveReason) {
+            handleStopKeepalive(mNai, mSlot, socketKeepaliveReason);
+        }
     }
 
     void notifyMessenger(Messenger messenger, int slot, int err) {
         Message message = Message.obtain();
-        message.what = EVENT_PACKET_KEEPALIVE;
+        message.what = EVENT_SOCKET_KEEPALIVE;
         message.arg1 = slot;
         message.arg2 = err;
         message.obj = null;
@@ -310,7 +376,7 @@
     }
 
     /** Handle keepalive events from lower layer. */
-    public void handleEventPacketKeepalive(@NonNull NetworkAgentInfo nai,
+    public void handleEventSocketKeepalive(@NonNull NetworkAgentInfo nai,
             @NonNull Message message) {
         int slot = message.arg1;
         int reason = message.arg2;
@@ -324,20 +390,38 @@
             return;
         }
 
-        if (reason == SUCCESS && !ki.isStarted) {
+        // This can be called in a number of situations :
+        // - startedState is STARTING.
+        //   - reason is SUCCESS => go to STARTED.
+        //   - reason isn't SUCCESS => it's an error starting. Go to NOT_STARTED and stop keepalive.
+        // - startedState is STARTED.
+        //   - reason is SUCCESS => it's a success stopping. Go to NOT_STARTED and stop keepalive.
+        //   - reason isn't SUCCESS => it's an error in exec. Go to NOT_STARTED and stop keepalive.
+        // The control is not supposed to ever come here if the state is NOT_STARTED. This is
+        // because in NOT_STARTED state, the code will switch to STARTING before sending messages
+        // to start, and the only way to NOT_STARTED is this function, through the edges outlined
+        // above : in all cases, keepalive gets stopped and can't restart without going into
+        // STARTING as messages are ordered. This also depends on the hardware processing the
+        // messages in order.
+        // TODO : clarify this code and get rid of mStartedState. Using a StateMachine is an
+        // option.
+        if (reason == SUCCESS && KeepaliveInfo.STARTING == ki.mStartedState) {
             // Keepalive successfully started.
             if (DBG) Log.d(TAG, "Started keepalive " + slot + " on " + nai.name());
-            ki.isStarted = true;
+            ki.mStartedState = KeepaliveInfo.STARTED;
             ki.notifyMessenger(slot, reason);
         } else {
             // Keepalive successfully stopped, or error.
-            ki.isStarted = false;
+            ki.mStartedState = KeepaliveInfo.NOT_STARTED;
             if (reason == SUCCESS) {
+                // The message indicated success stopping : don't call handleStopKeepalive.
                 if (DBG) Log.d(TAG, "Successfully stopped keepalive " + slot + " on " + nai.name());
             } else {
+                // The message indicated some error trying to start or during the course of
+                // keepalive : do call handleStopKeepalive.
+                handleStopKeepalive(nai, slot, reason);
                 if (DBG) Log.d(TAG, "Keepalive " + slot + " on " + nai.name() + " error " + reason);
             }
-            handleStopKeepalive(nai, slot, reason);
         }
     }
 
@@ -369,16 +453,55 @@
 
         KeepalivePacketData packet;
         try {
-            packet = KeepalivePacketData.nattKeepalivePacket(
+            packet = NattKeepalivePacketData.nattKeepalivePacket(
                     srcAddress, srcPort, dstAddress, NATT_PORT);
-        } catch (KeepalivePacketData.InvalidPacketException e) {
+        } catch (InvalidPacketException e) {
             notifyMessenger(messenger, NO_KEEPALIVE, e.error);
             return;
         }
-        KeepaliveInfo ki = new KeepaliveInfo(messenger, binder, nai, packet, intervalSeconds);
-        Log.d(TAG, "Created keepalive: " + ki.toString());
+        KeepaliveInfo ki = new KeepaliveInfo(messenger, binder, nai, packet, intervalSeconds,
+                KeepaliveInfo.TYPE_NATT, null);
         mConnectivityServiceHandler.obtainMessage(
-                NetworkAgent.CMD_START_PACKET_KEEPALIVE, ki).sendToTarget();
+                NetworkAgent.CMD_START_SOCKET_KEEPALIVE, ki).sendToTarget();
+    }
+
+    /**
+     * Called by ConnectivityService to start TCP keepalive on a file descriptor.
+     *
+     * In order to offload keepalive for application correctly, sequence number, ack number and
+     * other fields are needed to form the keepalive packet. Thus, this function synchronously
+     * puts the socket into repair mode to get the necessary information. After the socket has been
+     * put into repair mode, the application cannot access the socket until reverted to normal.
+     *
+     * See {@link android.net.SocketKeepalive}.
+     **/
+    public void startTcpKeepalive(@Nullable NetworkAgentInfo nai,
+            @NonNull FileDescriptor fd,
+            int intervalSeconds,
+            @NonNull Messenger messenger,
+            @NonNull IBinder binder) {
+        if (nai == null) {
+            notifyMessenger(messenger, NO_KEEPALIVE, ERROR_INVALID_NETWORK);
+            return;
+        }
+
+        TcpKeepalivePacketData packet = null;
+        try {
+            TcpSocketInfo tsi = TcpKeepaliveController.switchToRepairMode(fd);
+            packet = TcpKeepalivePacketData.tcpKeepalivePacket(tsi);
+        } catch (InvalidPacketException | InvalidSocketException e) {
+            try {
+                TcpKeepaliveController.switchOutOfRepairMode(fd);
+            } catch (ErrnoException e1) {
+                Log.e(TAG, "Couldn't move fd out of repair mode after failure to start keepalive");
+            }
+            notifyMessenger(messenger, NO_KEEPALIVE, e.error);
+            return;
+        }
+        KeepaliveInfo ki = new KeepaliveInfo(messenger, binder, nai, packet, intervalSeconds,
+                KeepaliveInfo.TYPE_TCP, fd);
+        Log.d(TAG, "Created keepalive: " + ki.toString());
+        mConnectivityServiceHandler.obtainMessage(CMD_START_SOCKET_KEEPALIVE, ki).sendToTarget();
     }
 
    /**
@@ -432,7 +555,7 @@
     }
 
     public void dump(IndentingPrintWriter pw) {
-        pw.println("Packet keepalives:");
+        pw.println("Socket keepalives:");
         pw.increaseIndent();
         for (NetworkAgentInfo nai : mKeepalives.keySet()) {
             pw.println(nai.name());
diff --git a/services/core/java/com/android/server/connectivity/TcpKeepaliveController.java b/services/core/java/com/android/server/connectivity/TcpKeepaliveController.java
new file mode 100644
index 0000000..8a9ac23
--- /dev/null
+++ b/services/core/java/com/android/server/connectivity/TcpKeepaliveController.java
@@ -0,0 +1,316 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.server.connectivity;
+
+import static android.net.SocketKeepalive.DATA_RECEIVED;
+import static android.net.SocketKeepalive.ERROR_INVALID_SOCKET;
+import static android.net.SocketKeepalive.ERROR_SOCKET_NOT_IDLE;
+import static android.os.MessageQueue.OnFileDescriptorEventListener.EVENT_ERROR;
+import static android.os.MessageQueue.OnFileDescriptorEventListener.EVENT_INPUT;
+import static android.system.OsConstants.FIONREAD;
+import static android.system.OsConstants.IPPROTO_TCP;
+import static android.system.OsConstants.TIOCOUTQ;
+
+import android.annotation.NonNull;
+import android.net.NetworkUtils;
+import android.net.SocketKeepalive.InvalidSocketException;
+import android.net.TcpKeepalivePacketData.TcpSocketInfo;
+import android.net.TcpRepairWindow;
+import android.os.Handler;
+import android.os.MessageQueue;
+import android.os.Messenger;
+import android.system.ErrnoException;
+import android.system.Int32Ref;
+import android.system.Os;
+import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.server.connectivity.KeepaliveTracker.KeepaliveInfo;
+
+import java.io.FileDescriptor;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.SocketAddress;
+import java.net.SocketException;
+
+/**
+ * Manage tcp socket which offloads tcp keepalive.
+ *
+ * The input socket will be changed to repair mode and the application
+ * will not have permission to read/write data. If the application wants
+ * to write data, it must stop tcp keepalive offload to leave repair mode
+ * first. If a remote packet arrives, repair mode will be turned off and
+ * offload will be stopped. The application will receive a callback to know
+ * it can start reading data.
+ *
+ * {start,stop}SocketMonitor are thread-safe, but care must be taken in the
+ * order in which they are called. Please note that while calling
+ * {@link #startSocketMonitor(FileDescriptor, Messenger, int)} multiple times
+ * with either the same slot or the same FileDescriptor without stopping it in
+ * between will result in an exception, calling {@link #stopSocketMonitor(int)}
+ * multiple times with the same int is explicitly a no-op.
+ * Please also note that switching the socket to repair mode is not synchronized
+ * with either of these operations and has to be done in an orderly fashion
+ * with stopSocketMonitor. Take care in calling these in the right order.
+ * @hide
+ */
+public class TcpKeepaliveController {
+    private static final String TAG = "TcpKeepaliveController";
+    private static final boolean DBG = false;
+
+    private final MessageQueue mFdHandlerQueue;
+
+    private static final int FD_EVENTS = EVENT_INPUT | EVENT_ERROR;
+
+    // Reference include/uapi/linux/tcp.h
+    private static final int TCP_REPAIR = 19;
+    private static final int TCP_REPAIR_QUEUE = 20;
+    private static final int TCP_QUEUE_SEQ = 21;
+    private static final int TCP_NO_QUEUE = 0;
+    private static final int TCP_RECV_QUEUE = 1;
+    private static final int TCP_SEND_QUEUE = 2;
+    private static final int TCP_REPAIR_OFF = 0;
+    private static final int TCP_REPAIR_ON = 1;
+    // Reference include/uapi/linux/sockios.h
+    private static final int SIOCINQ = FIONREAD;
+    private static final int SIOCOUTQ = TIOCOUTQ;
+
+    /**
+     * Keeps track of packet listeners.
+     * Key: slot number of keepalive offload.
+     * Value: {@link FileDescriptor} being listened to.
+     */
+    @GuardedBy("mListeners")
+    private final SparseArray<FileDescriptor> mListeners = new SparseArray<>();
+
+    public TcpKeepaliveController(final Handler connectivityServiceHandler) {
+        mFdHandlerQueue = connectivityServiceHandler.getLooper().getQueue();
+    }
+
+    /**
+     * Switch the tcp socket to repair mode and query tcp socket information.
+     *
+     * @param fd the fd of socket on which to use keepalive offload
+     * @return a {@link TcpKeepalivePacketData#TcpSocketInfo} object for current
+     * tcp/ip information.
+     */
+    // TODO : make this private. It's far too confusing that this gets called from outside
+    // at a time that nobody can understand.
+    public static TcpSocketInfo switchToRepairMode(FileDescriptor fd)
+            throws InvalidSocketException {
+        if (DBG) Log.i(TAG, "switchToRepairMode to start tcp keepalive : " + fd);
+        final SocketAddress srcSockAddr;
+        final SocketAddress dstSockAddr;
+        final InetAddress srcAddress;
+        final InetAddress dstAddress;
+        final int srcPort;
+        final int dstPort;
+        int seq;
+        final int ack;
+        final TcpRepairWindow trw;
+
+        // Query source address and port.
+        try {
+            srcSockAddr = Os.getsockname(fd);
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Get sockname fail: ", e);
+            throw new InvalidSocketException(ERROR_INVALID_SOCKET, e);
+        }
+        if (srcSockAddr instanceof InetSocketAddress) {
+            srcAddress = getAddress((InetSocketAddress) srcSockAddr);
+            srcPort = getPort((InetSocketAddress) srcSockAddr);
+        } else {
+            Log.e(TAG, "Invalid or mismatched SocketAddress");
+            throw new InvalidSocketException(ERROR_INVALID_SOCKET);
+        }
+        // Query destination address and port.
+        try {
+            dstSockAddr = Os.getpeername(fd);
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Get peername fail: ", e);
+            throw new InvalidSocketException(ERROR_INVALID_SOCKET, e);
+        }
+        if (dstSockAddr instanceof InetSocketAddress) {
+            dstAddress = getAddress((InetSocketAddress) dstSockAddr);
+            dstPort = getPort((InetSocketAddress) dstSockAddr);
+        } else {
+            Log.e(TAG, "Invalid or mismatched peer SocketAddress");
+            throw new InvalidSocketException(ERROR_INVALID_SOCKET);
+        }
+
+        // Query sequence and ack number
+        dropAllIncomingPackets(fd, true);
+        try {
+            // Enter tcp repair mode.
+            Os.setsockoptInt(fd, IPPROTO_TCP, TCP_REPAIR, TCP_REPAIR_ON);
+            // Check if socket is idle.
+            if (!isSocketIdle(fd)) {
+                throw new InvalidSocketException(ERROR_SOCKET_NOT_IDLE);
+            }
+            // Query write sequence number from SEND_QUEUE.
+            Os.setsockoptInt(fd, IPPROTO_TCP, TCP_REPAIR_QUEUE, TCP_SEND_QUEUE);
+            seq = Os.getsockoptInt(fd, IPPROTO_TCP, TCP_QUEUE_SEQ);
+            // Query read sequence number from RECV_QUEUE.
+            Os.setsockoptInt(fd, IPPROTO_TCP, TCP_REPAIR_QUEUE, TCP_RECV_QUEUE);
+            ack = Os.getsockoptInt(fd, IPPROTO_TCP, TCP_QUEUE_SEQ);
+            // Switch to NO_QUEUE to prevent illegal socket read/write in repair mode.
+            Os.setsockoptInt(fd, IPPROTO_TCP, TCP_REPAIR_QUEUE, TCP_NO_QUEUE);
+            // Finally, check if socket is still idle. TODO : this check needs to move to
+            // after starting polling to prevent a race.
+            if (!isSocketIdle(fd)) {
+                throw new InvalidSocketException(ERROR_INVALID_SOCKET);
+            }
+
+            // Query tcp window size.
+            trw = NetworkUtils.getTcpRepairWindow(fd);
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Exception reading TCP state from socket", e);
+            try {
+                Os.setsockoptInt(fd, IPPROTO_TCP, TCP_REPAIR, TCP_REPAIR_OFF);
+            } catch (ErrnoException ex) {
+                Log.e(TAG, "Exception while turning off repair mode due to exception", ex);
+            }
+            throw new InvalidSocketException(ERROR_INVALID_SOCKET, e);
+        } finally {
+            dropAllIncomingPackets(fd, false);
+        }
+
+        // Keepalive sequence number is last sequence number - 1. If it couldn't be retrieved,
+        // then it must be set to -1, so decrement in all cases.
+        seq = seq - 1;
+
+        return new TcpSocketInfo(srcAddress, srcPort, dstAddress, dstPort, seq, ack, trw.rcvWnd,
+                trw.rcvWndScale);
+    }
+
+    /**
+     * Switch the tcp socket out of repair mode.
+     *
+     * @param fd the fd of socket to switch back to normal.
+     */
+    // TODO : make this private.
+    public static void switchOutOfRepairMode(@NonNull final FileDescriptor fd)
+            throws ErrnoException {
+        Os.setsockoptInt(fd, IPPROTO_TCP, TCP_REPAIR, TCP_REPAIR_OFF);
+    }
+
+    /**
+     * Start monitoring incoming packets.
+     *
+     * @param fd socket fd to monitor.
+     * @param messenger a callback to notify socket status.
+     * @param slot keepalive slot.
+     */
+    public void startSocketMonitor(@NonNull final FileDescriptor fd,
+            @NonNull final KeepaliveInfo ki, final int slot) {
+        synchronized (mListeners) {
+            if (null != mListeners.get(slot)) {
+                throw new IllegalArgumentException("This slot is already taken");
+            }
+            for (int i = 0; i < mListeners.size(); ++i) {
+                if (fd.equals(mListeners.valueAt(i))) {
+                    throw new IllegalArgumentException("This fd is already registered");
+                }
+            }
+            mFdHandlerQueue.addOnFileDescriptorEventListener(fd, FD_EVENTS, (readyFd, events) -> {
+                // This can't be called twice because the queue guarantees that once the listener
+                // is unregistered it can't be called again, even for a message that arrived
+                // before it was unregistered.
+                final int reason;
+                if (0 != (events & EVENT_ERROR)) {
+                    reason = ERROR_INVALID_SOCKET;
+                } else {
+                    reason = DATA_RECEIVED;
+                }
+                ki.onFileDescriptorInitiatedStop(reason);
+                // The listener returns the new set of events to listen to. Because 0 means no
+                // event, the listener gets unregistered.
+                return 0;
+            });
+            mListeners.put(slot, fd);
+        }
+    }
+
+    /** Stop socket monitor */
+    // This slot may have been stopped automatically already because the socket received data,
+    // was closed on the other end or otherwise suffered some error. In this case, this function
+    // is a no-op.
+    public void stopSocketMonitor(final int slot) {
+        final FileDescriptor fd;
+        synchronized (mListeners) {
+            fd = mListeners.get(slot);
+            if (null == fd) return;
+            mListeners.remove(slot);
+        }
+        mFdHandlerQueue.removeOnFileDescriptorEventListener(fd);
+        try {
+            if (DBG) Log.d(TAG, "Moving socket out of repair mode for stop : " + fd);
+            switchOutOfRepairMode(fd);
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Cannot switch socket out of repair mode", e);
+            // Well, there is not much to do here to recover
+        }
+    }
+
+    private static InetAddress getAddress(InetSocketAddress inetAddr) {
+        return inetAddr.getAddress();
+    }
+
+    private static int getPort(InetSocketAddress inetAddr) {
+        return inetAddr.getPort();
+    }
+
+    private static boolean isSocketIdle(FileDescriptor fd) throws ErrnoException {
+        return isReceiveQueueEmpty(fd) && isSendQueueEmpty(fd);
+    }
+
+    private static boolean isReceiveQueueEmpty(FileDescriptor fd)
+            throws ErrnoException {
+        Int32Ref result = new Int32Ref(-1);
+        Os.ioctlInt(fd, SIOCINQ, result);
+        if (result.value != 0) {
+            Log.e(TAG, "Read queue has data");
+            return false;
+        }
+        return true;
+    }
+
+    private static boolean isSendQueueEmpty(FileDescriptor fd)
+            throws ErrnoException {
+        Int32Ref result = new Int32Ref(-1);
+        Os.ioctlInt(fd, SIOCOUTQ, result);
+        if (result.value != 0) {
+            Log.e(TAG, "Write queue has data");
+            return false;
+        }
+        return true;
+    }
+
+    private static void dropAllIncomingPackets(FileDescriptor fd, boolean enable)
+            throws InvalidSocketException {
+        try {
+            if (enable) {
+                NetworkUtils.attachDropAllBPFFilter(fd);
+            } else {
+                NetworkUtils.detachBPFFilter(fd);
+            }
+        } catch (SocketException e) {
+            Log.e(TAG, "Socket Exception: ", e);
+            throw new InvalidSocketException(ERROR_INVALID_SOCKET, e);
+        }
+    }
+}
diff --git a/services/core/java/com/android/server/os/BugreportManagerServiceImpl.java b/services/core/java/com/android/server/os/BugreportManagerServiceImpl.java
index f736056..1dada92 100644
--- a/services/core/java/com/android/server/os/BugreportManagerServiceImpl.java
+++ b/services/core/java/com/android/server/os/BugreportManagerServiceImpl.java
@@ -17,8 +17,10 @@
 package com.android.server.os;
 
 import android.annotation.RequiresPermission;
+import android.app.ActivityManager;
 import android.app.AppOpsManager;
 import android.content.Context;
+import android.content.pm.UserInfo;
 import android.os.Binder;
 import android.os.BugreportParams;
 import android.os.IDumpstate;
@@ -28,26 +30,29 @@
 import android.os.ServiceManager;
 import android.os.SystemClock;
 import android.os.SystemProperties;
+import android.os.UserManager;
 import android.util.Slog;
 
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.util.Preconditions;
+
 import java.io.FileDescriptor;
 
 // TODO(b/111441001):
-// 1. Handle the case where another bugreport is in progress
-// 2. Make everything threadsafe
-// 3. Pass validation & other errors on listener
+// Intercept onFinished() & implement death recipient here and shutdown
+// bugreportd service.
 
 /**
  * Implementation of the service that provides a privileged API to capture and consume bugreports.
  *
- * <p>Delegates the actualy generation to a native implementation of {@code Dumpstate}.
+ * <p>Delegates the actualy generation to a native implementation of {@code IDumpstate}.
  */
 class BugreportManagerServiceImpl extends IDumpstate.Stub {
     private static final String TAG = "BugreportManagerService";
     private static final String BUGREPORT_SERVICE = "bugreportd";
     private static final long DEFAULT_BUGREPORT_SERVICE_TIMEOUT_MILLIS = 30 * 1000;
 
-    private IDumpstate mDs = null;
+    private final Object mLock = new Object();
     private final Context mContext;
     private final AppOpsManager mAppOps;
 
@@ -59,43 +64,44 @@
     @Override
     @RequiresPermission(android.Manifest.permission.DUMP)
     public IDumpstateToken setListener(String name, IDumpstateListener listener,
-            boolean getSectionDetails) throws RemoteException {
-        // TODO(b/111441001): Figure out if lazy setting of listener should be allowed
-        // and if so how to handle it.
+            boolean getSectionDetails) {
         throw new UnsupportedOperationException("setListener is not allowed on this service");
     }
 
-    // TODO(b/111441001): Intercept onFinished here in system server and shutdown
-    // the bugreportd service.
     @Override
     @RequiresPermission(android.Manifest.permission.DUMP)
     public void startBugreport(int callingUidUnused, String callingPackage,
             FileDescriptor bugreportFd, FileDescriptor screenshotFd,
-            int bugreportMode, IDumpstateListener listener) throws RemoteException {
-        int callingUid = Binder.getCallingUid();
-        // TODO(b/111441001): validate all arguments & ensure primary user
-        validate(bugreportMode);
+            int bugreportMode, IDumpstateListener listener) {
+        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, "startBugreport");
+        Preconditions.checkNotNull(callingPackage);
+        Preconditions.checkNotNull(bugreportFd);
+        Preconditions.checkNotNull(listener);
+        validateBugreportMode(bugreportMode);
+        ensureIsPrimaryUser();
 
+        int callingUid = Binder.getCallingUid();
         mAppOps.checkPackage(callingUid, callingPackage);
-        mDs = getDumpstateService();
-        if (mDs == null) {
-            Slog.w(TAG, "Unable to get bugreport service");
-            // TODO(b/111441001): pass error on listener
-            return;
+
+        synchronized (mLock) {
+            startBugreportLocked(callingUid, callingPackage, bugreportFd, screenshotFd,
+                    bugreportMode, listener);
         }
-        mDs.startBugreport(callingUid, callingPackage,
-                bugreportFd, screenshotFd, bugreportMode, listener);
     }
 
     @Override
     @RequiresPermission(android.Manifest.permission.DUMP)
-    public void cancelBugreport() throws RemoteException {
-        // This tells init to cancel bugreportd service.
-        SystemProperties.set("ctl.stop", BUGREPORT_SERVICE);
-        mDs = null;
+    public void cancelBugreport() {
+        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, "startBugreport");
+        // This tells init to cancel bugreportd service. Note that this is achieved through setting
+        // a system property which is not thread-safe. So the lock here offers thread-safety only
+        // among callers of the API.
+        synchronized (mLock) {
+            SystemProperties.set("ctl.stop", BUGREPORT_SERVICE);
+        }
     }
 
-    private boolean validate(@BugreportParams.BugreportMode int mode) {
+    private void validateBugreportMode(@BugreportParams.BugreportMode int mode) {
         if (mode != BugreportParams.BUGREPORT_MODE_FULL
                 && mode != BugreportParams.BUGREPORT_MODE_INTERACTIVE
                 && mode != BugreportParams.BUGREPORT_MODE_REMOTE
@@ -103,9 +109,66 @@
                 && mode != BugreportParams.BUGREPORT_MODE_TELEPHONY
                 && mode != BugreportParams.BUGREPORT_MODE_WIFI) {
             Slog.w(TAG, "Unknown bugreport mode: " + mode);
-            return false;
+            throw new IllegalArgumentException("Unknown bugreport mode: " + mode);
         }
-        return true;
+    }
+
+    /**
+     * Validates that the current user is the primary user.
+     *
+     * @throws IllegalArgumentException if the current user is not the primary user
+     */
+    private void ensureIsPrimaryUser() {
+        UserInfo currentUser = null;
+        try {
+            currentUser = ActivityManager.getService().getCurrentUser();
+        } catch (RemoteException e) {
+            // Impossible to get RemoteException for an in-process call.
+        }
+
+        UserInfo primaryUser = UserManager.get(mContext).getPrimaryUser();
+        if (currentUser == null) {
+            logAndThrow("No current user. Only primary user is allowed to take bugreports.");
+        }
+        if (primaryUser == null) {
+            logAndThrow("No primary user. Only primary user is allowed to take bugreports.");
+        }
+        if (primaryUser.id != currentUser.id) {
+            logAndThrow("Current user not primary user. Only primary user"
+                    + " is allowed to take bugreports.");
+        }
+    }
+
+    @GuardedBy("mLock")
+    private void startBugreportLocked(int callingUid, String callingPackage,
+            FileDescriptor bugreportFd, FileDescriptor screenshotFd,
+            int bugreportMode, IDumpstateListener listener) {
+        if (isDumpstateBinderServiceRunningLocked()) {
+            Slog.w(TAG, "'dumpstate' is already running. Cannot start a new bugreport"
+                    + " while another one is currently in progress.");
+            // TODO(b/111441001): Use a new error code; add this to the documentation of the API.
+            reportError(listener, IDumpstateListener.BUGREPORT_ERROR_RUNTIME_ERROR);
+            return;
+        }
+
+        IDumpstate ds = startAndGetDumpstateBinderServiceLocked();
+        if (ds == null) {
+            Slog.w(TAG, "Unable to get bugreport service");
+            reportError(listener, IDumpstateListener.BUGREPORT_ERROR_RUNTIME_ERROR);
+            return;
+        }
+        try {
+            ds.startBugreport(callingUid, callingPackage,
+                    bugreportFd, screenshotFd, bugreportMode, listener);
+        } catch (RemoteException e) {
+            reportError(listener, IDumpstateListener.BUGREPORT_ERROR_RUNTIME_ERROR);
+        }
+    }
+
+    @GuardedBy("mLock")
+    private boolean isDumpstateBinderServiceRunningLocked() {
+        IDumpstate ds = IDumpstate.Stub.asInterface(ServiceManager.getService("dumpstate"));
+        return ds != null;
     }
 
     /*
@@ -115,8 +178,12 @@
      * <p>Generating bugreports requires root privileges. To limit the footprint
      * of the root access, the actual generation in Dumpstate binary is accessed as a
      * oneshot service 'bugreport'.
+     *
+     * <p>Note that starting the service is achieved through setting a system property, which is
+     * not thread-safe. So the lock here offers thread-safety only among callers of the API.
      */
-    private IDumpstate getDumpstateService() {
+    @GuardedBy("mLock")
+    private IDumpstate startAndGetDumpstateBinderServiceLocked() {
         // Start bugreport service.
         SystemProperties.set("ctl.start", BUGREPORT_SERVICE);
 
@@ -145,4 +212,18 @@
         }
         return ds;
     }
+
+    private void reportError(IDumpstateListener listener, int errorCode) {
+        try {
+            listener.onError(errorCode);
+        } catch (RemoteException e) {
+            // Something went wrong in binder or app process. There's nothing to do here.
+            Slog.w(TAG, "onError() transaction threw RemoteException: " + e.getMessage());
+        }
+    }
+
+    private void logAndThrow(String message) {
+        Slog.w(TAG, message);
+        throw new IllegalArgumentException(message);
+    }
 }
diff --git a/services/core/java/com/android/server/tv/TvInputHardwareManager.java b/services/core/java/com/android/server/tv/TvInputHardwareManager.java
old mode 100644
new mode 100755
index c1607e9..f08e585
--- a/services/core/java/com/android/server/tv/TvInputHardwareManager.java
+++ b/services/core/java/com/android/server/tv/TvInputHardwareManager.java
@@ -24,7 +24,6 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
-import android.content.pm.PackageManager;
 import android.hardware.hdmi.HdmiControlManager;
 import android.hardware.hdmi.HdmiDeviceInfo;
 import android.hardware.hdmi.HdmiHotplugEvent;
@@ -46,7 +45,6 @@
 import android.media.tv.TvInputHardwareInfo;
 import android.media.tv.TvInputInfo;
 import android.media.tv.TvStreamConfig;
-import android.os.Binder;
 import android.os.Handler;
 import android.os.IBinder;
 import android.os.Message;
@@ -56,7 +54,6 @@
 import android.util.Slog;
 import android.util.SparseArray;
 import android.util.SparseBooleanArray;
-import android.view.KeyEvent;
 import android.view.Surface;
 
 import com.android.internal.util.DumpUtils;
@@ -943,7 +940,7 @@
                         sinkChannelMask = sinkConfig.channelMask();
                     }
                     if (sinkFormat == AudioFormat.ENCODING_DEFAULT) {
-                        sinkChannelMask = sinkConfig.format();
+                        sinkFormat = sinkConfig.format();
                     }
                 }
 
diff --git a/services/core/java/com/android/server/tv/TvInputManagerService.java b/services/core/java/com/android/server/tv/TvInputManagerService.java
index d5e59c8..c30babd 100644
--- a/services/core/java/com/android/server/tv/TvInputManagerService.java
+++ b/services/core/java/com/android/server/tv/TvInputManagerService.java
@@ -128,6 +128,8 @@
 
     private final WatchLogHandler mWatchLogHandler;
 
+    private IBinder.DeathRecipient mDeathRecipient;
+
     public TvInputManagerService(Context context) {
         super(context);
 
@@ -672,6 +674,7 @@
                 if (sessionToken == userState.mainSessionToken) {
                     setMainLocked(sessionToken, false, callingUid, userId);
                 }
+                sessionState.session.asBinder().unlinkToDeath(sessionState, 0);
                 sessionState.session.release();
             }
         } catch (RemoteException | SessionNotFoundException e) {
@@ -707,6 +710,7 @@
             clientState.sessionTokens.remove(sessionToken);
             if (clientState.isEmpty()) {
                 userState.clientStateMap.remove(sessionState.client.asBinder());
+                sessionState.client.asBinder().unlinkToDeath(clientState, 0);
             }
         }
 
@@ -1000,17 +1004,19 @@
                 synchronized (mLock) {
                     final UserState userState = getOrCreateUserStateLocked(resolvedUserId);
                     userState.callbackSet.add(callback);
-                    try {
-                        callback.asBinder().linkToDeath(new IBinder.DeathRecipient() {
-                            @Override
-                            public void binderDied() {
-                                synchronized (mLock) {
-                                    if (userState.callbackSet != null) {
-                                        userState.callbackSet.remove(callback);
-                                    }
+                    mDeathRecipient = new IBinder.DeathRecipient() {
+                        @Override
+                        public void binderDied() {
+                            synchronized (mLock) {
+                                if (userState.callbackSet != null) {
+                                    userState.callbackSet.remove(callback);
                                 }
                             }
-                        }, 0);
+                        }
+                    };
+
+                    try {
+                        callback.asBinder().linkToDeath(mDeathRecipient, 0);
                     } catch (RemoteException e) {
                         Slog.e(TAG, "client process has already died", e);
                     }
@@ -1029,6 +1035,7 @@
                 synchronized (mLock) {
                     UserState userState = getOrCreateUserStateLocked(resolvedUserId);
                     userState.callbackSet.remove(callback);
+                    callback.asBinder().unlinkToDeath(mDeathRecipient, 0);
                 }
             } finally {
                 Binder.restoreCallingIdentity(identity);
diff --git a/services/core/jni/Android.bp b/services/core/jni/Android.bp
index 5f2a0e8..6735ab4 100644
--- a/services/core/jni/Android.bp
+++ b/services/core/jni/Android.bp
@@ -120,6 +120,7 @@
         "android.frameworks.schedulerservice@1.0",
         "android.frameworks.sensorservice@1.0",
         "android.system.suspend@1.0",
+        "suspend_control_aidl_interface-cpp",
     ],
 
     static_libs: [
diff --git a/services/core/jni/com_android_server_am_BatteryStatsService.cpp b/services/core/jni/com_android_server_am_BatteryStatsService.cpp
index 0ff60e4..8f6cafb 100644
--- a/services/core/jni/com_android_server_am_BatteryStatsService.cpp
+++ b/services/core/jni/com_android_server_am_BatteryStatsService.cpp
@@ -30,8 +30,8 @@
 
 #include <android/hardware/power/1.0/IPower.h>
 #include <android/hardware/power/1.1/IPower.h>
-#include <android/system/suspend/1.0/ISystemSuspend.h>
-#include <android/system/suspend/1.0/ISystemSuspendCallback.h>
+#include <android/system/suspend/BnSuspendCallback.h>
+#include <android/system/suspend/ISuspendControlService.h>
 #include <android_runtime/AndroidRuntime.h>
 #include <jni.h>
 
@@ -44,14 +44,14 @@
 
 using android::hardware::Return;
 using android::hardware::Void;
+using android::system::suspend::BnSuspendCallback;
 using android::hardware::power::V1_0::PowerStatePlatformSleepState;
 using android::hardware::power::V1_0::PowerStateVoter;
 using android::hardware::power::V1_0::Status;
 using android::hardware::power::V1_1::PowerStateSubsystem;
 using android::hardware::power::V1_1::PowerStateSubsystemSleepState;
 using android::hardware::hidl_vec;
-using android::system::suspend::V1_0::ISystemSuspend;
-using android::system::suspend::V1_0::ISystemSuspendCallback;
+using android::system::suspend::ISuspendControlService;
 using IPowerV1_1 = android::hardware::power::V1_1::IPower;
 using IPowerV1_0 = android::hardware::power::V1_0::IPower;
 
@@ -66,7 +66,7 @@
 extern sp<IPowerV1_0> getPowerHalV1_0();
 extern sp<IPowerV1_1> getPowerHalV1_1();
 extern bool processPowerHalReturn(const Return<void> &ret, const char* functionName);
-extern sp<ISystemSuspend> getSuspendHal();
+extern sp<ISuspendControlService> getSuspendControl();
 
 // Java methods used in getLowPowerStats
 static jmethodID jgetAndUpdatePlatformState = NULL;
@@ -74,17 +74,17 @@
 static jmethodID jputVoter = NULL;
 static jmethodID jputState = NULL;
 
-class WakeupCallback : public ISystemSuspendCallback {
-public:
-    Return<void> notifyWakeup(bool success) override {
-        ALOGV("In wakeup_callback: %s", success ? "resumed from suspend" : "suspend aborted");
+class WakeupCallback : public BnSuspendCallback {
+   public:
+    binder::Status notifyWakeup(bool success) override {
+        ALOGI("In wakeup_callback: %s", success ? "resumed from suspend" : "suspend aborted");
         int ret = sem_post(&wakeup_sem);
         if (ret < 0) {
             char buf[80];
             strerror_r(errno, buf, sizeof(buf));
             ALOGE("Error posting wakeup sem: %s\n", buf);
         }
-        return Void();
+        return binder::Status::ok();
     }
 };
 
@@ -107,9 +107,12 @@
             jniThrowException(env, "java/lang/IllegalStateException", buf);
             return -1;
         }
-        ALOGV("Registering callback...");
-        sp<ISystemSuspend> suspendHal = getSuspendHal();
-        suspendHal->registerCallback(new WakeupCallback());
+        sp<ISuspendControlService> suspendControl = getSuspendControl();
+        bool isRegistered = false;
+        suspendControl->registerCallback(new WakeupCallback(), &isRegistered);
+        if (!isRegistered) {
+            ALOGE("Failed to register wakeup callback");
+        }
     }
 
     // Wait for wakeup.
diff --git a/services/core/jni/com_android_server_power_PowerManagerService.cpp b/services/core/jni/com_android_server_power_PowerManagerService.cpp
index 0c9b5f4..9be728b 100644
--- a/services/core/jni/com_android_server_power_PowerManagerService.cpp
+++ b/services/core/jni/com_android_server_power_PowerManagerService.cpp
@@ -20,6 +20,7 @@
 
 #include <android/hardware/power/1.1/IPower.h>
 #include <android/system/suspend/1.0/ISystemSuspend.h>
+#include <android/system/suspend/ISuspendControlService.h>
 #include <nativehelper/JNIHelp.h>
 #include "jni.h"
 
@@ -30,13 +31,14 @@
 #include <android-base/chrono_utils.h>
 #include <android_runtime/AndroidRuntime.h>
 #include <android_runtime/Log.h>
+#include <binder/IServiceManager.h>
+#include <hardware/power.h>
+#include <hardware_legacy/power.h>
+#include <hidl/ServiceManagement.h>
 #include <utils/Timers.h>
 #include <utils/misc.h>
 #include <utils/String8.h>
 #include <utils/Log.h>
-#include <hardware/power.h>
-#include <hardware_legacy/power.h>
-#include <hidl/ServiceManagement.h>
 
 #include "com_android_server_power_PowerManagerService.h"
 
@@ -48,6 +50,7 @@
 using android::system::suspend::V1_0::ISystemSuspend;
 using android::system::suspend::V1_0::IWakeLock;
 using android::system::suspend::V1_0::WakeLockType;
+using android::system::suspend::ISuspendControlService;
 using IPowerV1_1 = android::hardware::power::V1_1::IPower;
 using IPowerV1_0 = android::hardware::power::V1_0::IPower;
 
@@ -176,6 +179,7 @@
 }
 
 static sp<ISystemSuspend> gSuspendHal = nullptr;
+static sp<ISuspendControlService> gSuspendControl = nullptr;
 static sp<IWakeLock> gSuspendBlocker = nullptr;
 static std::mutex gSuspendMutex;
 
@@ -191,18 +195,33 @@
     return gSuspendHal;
 }
 
+sp<ISuspendControlService> getSuspendControl() {
+    static std::once_flag suspendControlFlag;
+    std::call_once(suspendControlFlag, [](){
+        while(gSuspendControl == nullptr) {
+            sp<IBinder> control =
+                    defaultServiceManager()->getService(String16("suspend_control"));
+            if (control != nullptr) {
+                gSuspendControl = interface_cast<ISuspendControlService>(control);
+            }
+        }
+    });
+    return gSuspendControl;
+}
+
 void enableAutoSuspend() {
     static bool enabled = false;
-
-    std::lock_guard<std::mutex> lock(gSuspendMutex);
     if (!enabled) {
-        sp<ISystemSuspend> suspendHal = getSuspendHal();
-        suspendHal->enableAutosuspend();
-        enabled = true;
+        sp<ISuspendControlService> suspendControl = getSuspendControl();
+        suspendControl->enableAutosuspend(&enabled);
     }
-    if (gSuspendBlocker) {
-        gSuspendBlocker->release();
-        gSuspendBlocker.clear();
+
+    {
+        std::lock_guard<std::mutex> lock(gSuspendMutex);
+        if (gSuspendBlocker) {
+            gSuspendBlocker->release();
+            gSuspendBlocker.clear();
+        }
     }
 }
 
diff --git a/startop/view_compiler/Android.bp b/startop/view_compiler/Android.bp
index f5b4308..37caeb2 100644
--- a/startop/view_compiler/Android.bp
+++ b/startop/view_compiler/Android.bp
@@ -58,6 +58,8 @@
         "util.cc",
         "layout_validation.cc",
     ],
+    // b/123880763, clang-tidy analyzer has segmentation fault with dex_builder.cc
+    tidy_checks: ["-clang-analyzer-*"],
     host_supported: true,
 }
 
diff --git a/startop/view_compiler/dex_builder.cc b/startop/view_compiler/dex_builder.cc
index a78f7d5..4c1a0dc7 100644
--- a/startop/view_compiler/dex_builder.cc
+++ b/startop/view_compiler/dex_builder.cc
@@ -21,8 +21,6 @@
 #include <fstream>
 #include <memory>
 
-#define DCHECK_NOT_NULL(p) DCHECK((p) != nullptr)
-
 namespace startop {
 namespace dex {
 
@@ -32,6 +30,8 @@
 using ::dex::kAccPublic;
 using Op = Instruction::Op;
 
+using Opcode = ::art::Instruction::Code;
+
 const TypeDescriptor TypeDescriptor::Int() { return TypeDescriptor{"I"}; };
 const TypeDescriptor TypeDescriptor::Void() { return TypeDescriptor{"V"}; };
 
@@ -42,6 +42,23 @@
 // Strings lengths can be 32 bits long, but encoded as LEB128 this can take up to five bytes.
 constexpr size_t kMaxEncodedStringLength{5};
 
+// Converts invoke-* to invoke-*/range
+constexpr Opcode InvokeToInvokeRange(Opcode opcode) {
+  switch (opcode) {
+    case ::art::Instruction::INVOKE_VIRTUAL:
+      return ::art::Instruction::INVOKE_VIRTUAL_RANGE;
+    case ::art::Instruction::INVOKE_DIRECT:
+      return ::art::Instruction::INVOKE_DIRECT_RANGE;
+    case ::art::Instruction::INVOKE_STATIC:
+      return ::art::Instruction::INVOKE_STATIC_RANGE;
+    case ::art::Instruction::INVOKE_INTERFACE:
+      return ::art::Instruction::INVOKE_INTERFACE_RANGE;
+    default:
+      LOG(FATAL) << opcode << " is not a recognized invoke opcode.";
+      UNREACHABLE();
+  }
+}
+
 }  // namespace
 
 std::ostream& operator<<(std::ostream& out, const Instruction::Op& opcode) {
@@ -55,6 +72,9 @@
     case Instruction::Op::kMove:
       out << "kMove";
       return out;
+    case Instruction::Op::kMoveObject:
+      out << "kMoveObject";
+      return out;
     case Instruction::Op::kInvokeVirtual:
       out << "kInvokeVirtual";
       return out;
@@ -233,6 +253,11 @@
   return shorty;
 }
 
+const TypeDescriptor& Prototype::ArgType(size_t index) const {
+  CHECK_LT(index, param_types_.size());
+  return param_types_[index];
+}
+
 ClassBuilder::ClassBuilder(DexBuilder* parent, const std::string& name, ir::Class* class_def)
     : parent_(parent), type_descriptor_{TypeDescriptor::FromClassname(name)}, class_(class_def) {}
 
@@ -257,10 +282,10 @@
   method->access_flags = kAccPublic | ::dex::kAccStatic;
 
   auto* code = dex_->Alloc<ir::Code>();
-  DCHECK_NOT_NULL(decl_->prototype);
+  CHECK(decl_->prototype != nullptr);
   size_t const num_args =
       decl_->prototype->param_types != nullptr ? decl_->prototype->param_types->types.size() : 0;
-  code->registers = num_registers_ + num_args;
+  code->registers = num_registers_ + num_args + kMaxScratchRegisters;
   code->ins_count = num_args;
   EncodeInstructions();
   code->instructions = slicer::ArrayView<const ::dex::u2>(buffer_.data(), buffer_.size());
@@ -292,7 +317,7 @@
 }
 
 void MethodBuilder::BuildConst4(Value target, int value) {
-  DCHECK_LT(value, 16);
+  CHECK_LT(value, 16);
   AddInstruction(Instruction::OpWithArgs(Op::kMove, target, Value::Immediate(value)));
 }
 
@@ -315,6 +340,7 @@
     case Instruction::Op::kReturnObject:
       return EncodeReturn(instruction, ::art::Instruction::RETURN_OBJECT);
     case Instruction::Op::kMove:
+    case Instruction::Op::kMoveObject:
       return EncodeMove(instruction);
     case Instruction::Op::kInvokeVirtual:
       return EncodeInvoke(instruction, art::Instruction::INVOKE_VIRTUAL);
@@ -338,33 +364,43 @@
 }
 
 void MethodBuilder::EncodeReturn(const Instruction& instruction, ::art::Instruction::Code opcode) {
-  DCHECK(!instruction.dest().has_value());
+  CHECK(!instruction.dest().has_value());
   if (instruction.args().size() == 0) {
     Encode10x(art::Instruction::RETURN_VOID);
   } else {
-    DCHECK_EQ(1, instruction.args().size());
+    CHECK_EQ(1, instruction.args().size());
     size_t source = RegisterValue(instruction.args()[0]);
     Encode11x(opcode, source);
   }
 }
 
 void MethodBuilder::EncodeMove(const Instruction& instruction) {
-  DCHECK_EQ(Instruction::Op::kMove, instruction.opcode());
-  DCHECK(instruction.dest().has_value());
-  DCHECK(instruction.dest()->is_register() || instruction.dest()->is_parameter());
-  DCHECK_EQ(1, instruction.args().size());
+  CHECK(Instruction::Op::kMove == instruction.opcode() ||
+        Instruction::Op::kMoveObject == instruction.opcode());
+  CHECK(instruction.dest().has_value());
+  CHECK(instruction.dest()->is_variable());
+  CHECK_EQ(1, instruction.args().size());
 
   const Value& source = instruction.args()[0];
 
   if (source.is_immediate()) {
     // TODO: support more registers
-    DCHECK_LT(RegisterValue(*instruction.dest()), 16);
+    CHECK_LT(RegisterValue(*instruction.dest()), 16);
     Encode11n(art::Instruction::CONST_4, RegisterValue(*instruction.dest()), source.value());
   } else if (source.is_string()) {
     constexpr size_t kMaxRegisters = 256;
-    DCHECK_LT(RegisterValue(*instruction.dest()), kMaxRegisters);
-    DCHECK_LT(source.value(), 65536);  // make sure we don't need a jumbo string
+    CHECK_LT(RegisterValue(*instruction.dest()), kMaxRegisters);
+    CHECK_LT(source.value(), 65536);  // make sure we don't need a jumbo string
     Encode21c(::art::Instruction::CONST_STRING, RegisterValue(*instruction.dest()), source.value());
+  } else if (source.is_variable()) {
+    // For the moment, we only use this when we need to reshuffle registers for
+    // an invoke instruction, meaning we are too big for the 4-bit version.
+    // We'll err on the side of caution and always generate the 16-bit form of
+    // the instruction.
+    Opcode opcode = instruction.opcode() == Instruction::Op::kMove
+                        ? ::art::Instruction::MOVE_16
+                        : ::art::Instruction::MOVE_OBJECT_16;
+    Encode32x(opcode, RegisterValue(*instruction.dest()), RegisterValue(source));
   } else {
     UNIMPLEMENTED(FATAL);
   }
@@ -373,22 +409,61 @@
 void MethodBuilder::EncodeInvoke(const Instruction& instruction, ::art::Instruction::Code opcode) {
   constexpr size_t kMaxArgs = 5;
 
+  // Currently, we only support up to 5 arguments.
   CHECK_LE(instruction.args().size(), kMaxArgs);
 
   uint8_t arguments[kMaxArgs]{};
+  bool has_long_args = false;
   for (size_t i = 0; i < instruction.args().size(); ++i) {
     CHECK(instruction.args()[i].is_variable());
     arguments[i] = RegisterValue(instruction.args()[i]);
+    if (!IsShortRegister(arguments[i])) {
+      has_long_args = true;
+    }
   }
 
-  Encode35c(opcode,
-            instruction.args().size(),
-            instruction.method_id(),
-            arguments[0],
-            arguments[1],
-            arguments[2],
-            arguments[3],
-            arguments[4]);
+  if (has_long_args) {
+    // Some of the registers don't fit in the four bit short form of the invoke
+    // instruction, so we need to do an invoke/range. To do this, we need to
+    // first move all the arguments into contiguous temporary registers.
+    std::array<Value, kMaxArgs> scratch{GetScratchRegisters<kMaxArgs>()};
+
+    const auto& prototype = dex_->GetPrototypeByMethodId(instruction.method_id());
+    CHECK(prototype.has_value());
+
+    for (size_t i = 0; i < instruction.args().size(); ++i) {
+      Instruction::Op move_op;
+      if (opcode == ::art::Instruction::INVOKE_VIRTUAL ||
+          opcode == ::art::Instruction::INVOKE_DIRECT) {
+        // In this case, there is an implicit `this` argument, which is always an object.
+        if (i == 0) {
+          move_op = Instruction::Op::kMoveObject;
+        } else {
+          move_op = prototype->ArgType(i - 1).is_object() ? Instruction::Op::kMoveObject
+                                                          : Instruction::Op::kMove;
+        }
+      } else {
+        move_op = prototype->ArgType(i).is_object() ? Instruction::Op::kMoveObject
+                                                    : Instruction::Op::kMove;
+      }
+
+      EncodeMove(Instruction::OpWithArgs(move_op, scratch[i], instruction.args()[i]));
+    }
+
+    Encode3rc(InvokeToInvokeRange(opcode),
+              instruction.args().size(),
+              instruction.method_id(),
+              RegisterValue(scratch[0]));
+  } else {
+    Encode35c(opcode,
+              instruction.args().size(),
+              instruction.method_id(),
+              arguments[0],
+              arguments[1],
+              arguments[2],
+              arguments[3],
+              arguments[4]);
+  }
 
   // If there is a return value, add a move-result instruction
   if (instruction.dest().has_value()) {
@@ -416,26 +491,26 @@
 }
 
 void MethodBuilder::EncodeNew(const Instruction& instruction) {
-  DCHECK_EQ(Instruction::Op::kNew, instruction.opcode());
-  DCHECK(instruction.dest().has_value());
-  DCHECK(instruction.dest()->is_variable());
-  DCHECK_EQ(1, instruction.args().size());
+  CHECK_EQ(Instruction::Op::kNew, instruction.opcode());
+  CHECK(instruction.dest().has_value());
+  CHECK(instruction.dest()->is_variable());
+  CHECK_EQ(1, instruction.args().size());
 
   const Value& type = instruction.args()[0];
-  DCHECK_LT(RegisterValue(*instruction.dest()), 256);
-  DCHECK(type.is_type());
+  CHECK_LT(RegisterValue(*instruction.dest()), 256);
+  CHECK(type.is_type());
   Encode21c(::art::Instruction::NEW_INSTANCE, RegisterValue(*instruction.dest()), type.value());
 }
 
 void MethodBuilder::EncodeCast(const Instruction& instruction) {
-  DCHECK_EQ(Instruction::Op::kCheckCast, instruction.opcode());
-  DCHECK(instruction.dest().has_value());
-  DCHECK(instruction.dest()->is_variable());
-  DCHECK_EQ(1, instruction.args().size());
+  CHECK_EQ(Instruction::Op::kCheckCast, instruction.opcode());
+  CHECK(instruction.dest().has_value());
+  CHECK(instruction.dest()->is_variable());
+  CHECK_EQ(1, instruction.args().size());
 
   const Value& type = instruction.args()[0];
-  DCHECK_LT(RegisterValue(*instruction.dest()), 256);
-  DCHECK(type.is_type());
+  CHECK_LT(RegisterValue(*instruction.dest()), 256);
+  CHECK(type.is_type());
   Encode21c(::art::Instruction::CHECK_CAST, RegisterValue(*instruction.dest()), type.value());
 }
 
@@ -443,9 +518,9 @@
   if (value.is_register()) {
     return value.value();
   } else if (value.is_parameter()) {
-    return value.value() + num_registers_;
+    return value.value() + num_registers_ + kMaxScratchRegisters;
   }
-  DCHECK(false && "Must be either a parameter or a register");
+  CHECK(false && "Must be either a parameter or a register");
   return 0;
 }
 
@@ -498,7 +573,7 @@
     // update the index -> ir node map (see tools/dexter/slicer/dex_ir_builder.cc)
     auto new_index = dex_file_->methods_indexes.AllocateIndex();
     auto& ir_node = dex_file_->methods_map[new_index];
-    SLICER_CHECK(ir_node == nullptr);
+    CHECK(ir_node == nullptr);
     ir_node = decl;
     decl->orig_index = decl->index = new_index;
 
@@ -508,6 +583,15 @@
   return entry;
 }
 
+std::optional<const Prototype> DexBuilder::GetPrototypeByMethodId(size_t method_id) const {
+  for (const auto& entry : method_id_map_) {
+    if (entry.second.id == method_id) {
+      return entry.first.prototype;
+    }
+  }
+  return {};
+}
+
 ir::Proto* DexBuilder::GetOrEncodeProto(Prototype prototype) {
   ir::Proto*& ir_proto = proto_map_[prototype];
   if (ir_proto == nullptr) {
diff --git a/startop/view_compiler/dex_builder.h b/startop/view_compiler/dex_builder.h
index 757d863..541d800 100644
--- a/startop/view_compiler/dex_builder.h
+++ b/startop/view_compiler/dex_builder.h
@@ -16,6 +16,7 @@
 #ifndef DEX_BUILDER_H_
 #define DEX_BUILDER_H_
 
+#include <array>
 #include <forward_list>
 #include <map>
 #include <optional>
@@ -70,6 +71,8 @@
   // Return the shorty descriptor, such as I or L
   std::string short_descriptor() const { return descriptor().substr(0, 1); }
 
+  bool is_object() const { return short_descriptor() == "L"; }
+
   bool operator<(const TypeDescriptor& rhs) const { return descriptor_ < rhs.descriptor_; }
 
  private:
@@ -92,6 +95,8 @@
   // Get the shorty descriptor, such as VII for (Int, Int) -> Void
   std::string Shorty() const;
 
+  const TypeDescriptor& ArgType(size_t index) const;
+
   bool operator<(const Prototype& rhs) const {
     return std::make_tuple(return_type_, param_types_) <
            std::make_tuple(rhs.return_type_, rhs.param_types_);
@@ -124,11 +129,13 @@
 
   size_t value() const { return value_; }
 
- private:
-  enum class Kind { kLocalRegister, kParameter, kImmediate, kString, kLabel, kType };
+  constexpr Value() : value_{0}, kind_{Kind::kInvalid} {}
 
-  const size_t value_;
-  const Kind kind_;
+ private:
+  enum class Kind { kInvalid, kLocalRegister, kParameter, kImmediate, kString, kLabel, kType };
+
+  size_t value_;
+  Kind kind_;
 
   constexpr Value(size_t value, Kind kind) : value_{value}, kind_{kind} {}
 };
@@ -151,6 +158,7 @@
     kInvokeStatic,
     kInvokeVirtual,
     kMove,
+    kMoveObject,
     kNew,
     kReturn,
     kReturnObject,
@@ -172,7 +180,7 @@
 
   // A cast instruction. Basically, `(type)val`
   static inline Instruction Cast(Value val, Value type) {
-    DCHECK(type.is_type());
+    CHECK(type.is_type());
     return OpWithArgs(Op::kCheckCast, val, type);
   }
 
@@ -343,21 +351,48 @@
     buffer_.push_back(b);
   }
 
+  inline void Encode32x(art::Instruction::Code opcode, uint16_t a, uint16_t b) {
+    buffer_.push_back(opcode);
+    buffer_.push_back(a);
+    buffer_.push_back(b);
+  }
+
   inline void Encode35c(art::Instruction::Code opcode, size_t a, uint16_t b, uint8_t c, uint8_t d,
                         uint8_t e, uint8_t f, uint8_t g) {
     // a|g|op|bbbb|f|e|d|c
 
     CHECK_LE(a, 5);
-    CHECK_LT(c, 16);
-    CHECK_LT(d, 16);
-    CHECK_LT(e, 16);
-    CHECK_LT(f, 16);
-    CHECK_LT(g, 16);
+    CHECK(IsShortRegister(c));
+    CHECK(IsShortRegister(d));
+    CHECK(IsShortRegister(e));
+    CHECK(IsShortRegister(f));
+    CHECK(IsShortRegister(g));
     buffer_.push_back((a << 12) | (g << 8) | opcode);
     buffer_.push_back(b);
     buffer_.push_back((f << 12) | (e << 8) | (d << 4) | c);
   }
 
+  inline void Encode3rc(art::Instruction::Code opcode, size_t a, uint16_t b, uint16_t c) {
+    CHECK_LE(a, 255);
+    buffer_.push_back((a << 8) | opcode);
+    buffer_.push_back(b);
+    buffer_.push_back(c);
+  }
+
+  static constexpr bool IsShortRegister(size_t register_value) { return register_value < 16; }
+
+  // Returns an array of num_regs scratch registers. These are guaranteed to be
+  // contiguous, so they are suitable for the invoke-*/range instructions.
+  template <int num_regs>
+  std::array<Value, num_regs> GetScratchRegisters() const {
+    static_assert(num_regs <= kMaxScratchRegisters);
+    std::array<Value, num_regs> regs;
+    for (size_t i = 0; i < num_regs; ++i) {
+      regs[i] = std::move(Value::Local(num_registers_ + i));
+    }
+    return regs;
+  }
+
   // Converts a register or parameter to its DEX register number.
   size_t RegisterValue(const Value& value) const;
 
@@ -379,6 +414,10 @@
   // A buffer to hold instructions that have been encoded.
   std::vector<::dex::u2> buffer_;
 
+  // We create some scratch registers for when we have to shuffle registers
+  // around to make legal DEX code.
+  static constexpr size_t kMaxScratchRegisters = 5;
+
   // How many registers we've allocated
   size_t num_registers_{0};
 
@@ -447,6 +486,8 @@
   const MethodDeclData& GetOrDeclareMethod(TypeDescriptor type, const std::string& name,
                                            Prototype prototype);
 
+  std::optional<const Prototype> GetPrototypeByMethodId(size_t method_id) const;
+
  private:
   // Looks up the ir::Proto* corresponding to this given prototype, or creates one if it does not
   // exist.
diff --git a/startop/view_compiler/dex_builder_test.cc b/startop/view_compiler/dex_builder_test.cc
index 61c86b4..90c256f 100644
--- a/startop/view_compiler/dex_builder_test.cc
+++ b/startop/view_compiler/dex_builder_test.cc
@@ -140,3 +140,41 @@
 
   EXPECT_TRUE(EncodeAndVerify(&dex_file));
 }
+
+// Write out and verify a DEX file that corresponds to:
+//
+// package dextest;
+// public class DexTest {
+//     public static int foo(String s) { return s.length(); }
+// }
+TEST(DexBuilderTest, VerifyDexCallManyRegisters) {
+  DexBuilder dex_file;
+
+  auto cbuilder{dex_file.MakeClass("dextest.DexTest")};
+
+  MethodBuilder method{cbuilder.CreateMethod(
+      "foo", Prototype{TypeDescriptor::Int()})};
+
+  Value result = method.MakeRegister();
+
+  // Make a bunch of registers
+  for (size_t i = 0; i < 25; ++i) {
+    method.MakeRegister();
+  }
+
+  // Now load a string literal into a register
+  Value string_val = method.MakeRegister();
+  method.BuildConstString(string_val, "foo");
+
+  MethodDeclData string_length =
+      dex_file.GetOrDeclareMethod(TypeDescriptor::FromClassname("java.lang.String"),
+                                  "length",
+                                  Prototype{TypeDescriptor::Int()});
+
+  method.AddInstruction(Instruction::InvokeVirtual(string_length.id, result, string_val));
+  method.BuildReturn(result);
+
+  method.Encode();
+
+  EXPECT_TRUE(EncodeAndVerify(&dex_file));
+}
diff --git a/startop/view_compiler/dex_builder_test/Android.bp b/startop/view_compiler/dex_builder_test/Android.bp
index d4f38ed..ac60e96 100644
--- a/startop/view_compiler/dex_builder_test/Android.bp
+++ b/startop/view_compiler/dex_builder_test/Android.bp
@@ -15,7 +15,7 @@
 //
 
 genrule {
-    name: "generate_compiled_layout",
+    name: "generate_compiled_layout1",
     tools: [":viewcompiler"],
     cmd: "$(location :viewcompiler) $(in) --dex --out $(out) --package android.startop.test",
     srcs: ["res/layout/layout1.xml"],
@@ -24,6 +24,16 @@
     ],
 }
 
+genrule {
+    name: "generate_compiled_layout2",
+    tools: [":viewcompiler"],
+    cmd: "$(location :viewcompiler) $(in) --dex --out $(out) --package android.startop.test",
+    srcs: ["res/layout/layout2.xml"],
+    out: [
+        "layout2.dex",
+    ],
+}
+
 android_test {
     name: "dex-builder-test",
     srcs: [
@@ -31,7 +41,7 @@
         "src/android/startop/test/LayoutCompilerTest.java",
     ],
     sdk_version: "current",
-    data: [":generate_dex_testcases", ":generate_compiled_layout"],
+    data: [":generate_dex_testcases", ":generate_compiled_layout1", ":generate_compiled_layout2"],
     static_libs: [
         "android-support-test",
         "guava",
diff --git a/startop/view_compiler/dex_builder_test/AndroidTest.xml b/startop/view_compiler/dex_builder_test/AndroidTest.xml
index 68d8fdc..92e2a71 100644
--- a/startop/view_compiler/dex_builder_test/AndroidTest.xml
+++ b/startop/view_compiler/dex_builder_test/AndroidTest.xml
@@ -26,6 +26,7 @@
         <option name="push" value="trivial.dex->/data/local/tmp/dex-builder-test/trivial.dex" />
         <option name="push" value="simple.dex->/data/local/tmp/dex-builder-test/simple.dex" />
         <option name="push" value="layout1.dex->/data/local/tmp/dex-builder-test/layout1.dex" />
+        <option name="push" value="layout2.dex->/data/local/tmp/dex-builder-test/layout2.dex" />
     </target_preparer>
 
     <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
diff --git a/startop/view_compiler/dex_builder_test/res/layout/layout2.xml b/startop/view_compiler/dex_builder_test/res/layout/layout2.xml
new file mode 100644
index 0000000..b092e1c
--- /dev/null
+++ b/startop/view_compiler/dex_builder_test/res/layout/layout2.xml
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <TableRow
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" >
+
+        <Button
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Button" />
+
+        <TableRow
+            android:layout_width="match_parent"
+            android:layout_height="match_parent" >
+
+            <Button
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="Button" />
+            <TableRow
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" >
+
+                <Button
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Button" />
+
+                <TableRow
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent" >
+
+                    <Button
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="Button" />
+                </TableRow>
+
+            </TableRow>
+        </TableRow>
+    </TableRow>
+</LinearLayout>
diff --git a/startop/view_compiler/dex_builder_test/src/android/startop/test/LayoutCompilerTest.java b/startop/view_compiler/dex_builder_test/src/android/startop/test/LayoutCompilerTest.java
index ce3ce83..a3b1b6c 100644
--- a/startop/view_compiler/dex_builder_test/src/android/startop/test/LayoutCompilerTest.java
+++ b/startop/view_compiler/dex_builder_test/src/android/startop/test/LayoutCompilerTest.java
@@ -36,11 +36,20 @@
     }
 
     @Test
-    public void loadAndInflaterLayout1() throws Exception {
+    public void loadAndInflateLayout1() throws Exception {
         ClassLoader dex_file = loadDexFile("layout1.dex");
         Class compiled_view = dex_file.loadClass("android.startop.test.CompiledView");
         Method layout1 = compiled_view.getMethod("layout1", Context.class, int.class);
         Context context = InstrumentationRegistry.getTargetContext();
         layout1.invoke(null, context, R.layout.layout1);
     }
+
+    @Test
+    public void loadAndInflateLayout2() throws Exception {
+        ClassLoader dex_file = loadDexFile("layout2.dex");
+        Class compiled_view = dex_file.loadClass("android.startop.test.CompiledView");
+        Method layout1 = compiled_view.getMethod("layout2", Context.class, int.class);
+        Context context = InstrumentationRegistry.getTargetContext();
+        layout1.invoke(null, context, R.layout.layout1);
+    }
 }
diff --git a/telecomm/java/android/telecom/CallScreeningService.java b/telecomm/java/android/telecom/CallScreeningService.java
index 826ad82..818ebd9 100644
--- a/telecomm/java/android/telecom/CallScreeningService.java
+++ b/telecomm/java/android/telecom/CallScreeningService.java
@@ -16,6 +16,7 @@
 
 package android.telecom;
 
+import android.annotation.IntDef;
 import android.annotation.NonNull;
 import android.annotation.SdkConstant;
 import android.app.Service;
@@ -32,6 +33,9 @@
 import com.android.internal.telecom.ICallScreeningAdapter;
 import com.android.internal.telecom.ICallScreeningService;
 
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
 /**
  * This service can be implemented by the default dialer (see
  * {@link TelecomManager#getDefaultDialerPackage()}) or a third party app to allow or disallow
@@ -88,6 +92,128 @@
  * </pre>
  */
 public abstract class CallScreeningService extends Service {
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            prefix = { "CALL_DURATION_" },
+            value = {CALL_DURATION_VERY_SHORT, CALL_DURATION_SHORT, CALL_DURATION_MEDIUM,
+                    CALL_DURATION_LONG})
+    public @interface CallDuration {}
+
+    /**
+     * Call duration reported with {@link #EXTRA_CALL_DURATION} to indicate to the
+     * {@link CallScreeningService} the duration of a call for which the user reported the nuisance
+     * status (see {@link TelecomManager#reportNuisanceCallStatus(Uri, boolean)}).  The
+     * {@link CallScreeningService} can use this as a signal for training nuisance detection
+     * algorithms.  The call duration is reported in coarse grained buckets to minimize exposure of
+     * identifying call log information to the {@link CallScreeningService}.
+     * <p>
+     * Indicates the call was < 3 seconds in duration.
+     */
+    public static final int CALL_DURATION_VERY_SHORT = 1;
+
+    /**
+     * Call duration reported with {@link #EXTRA_CALL_DURATION} to indicate to the
+     * {@link CallScreeningService} the duration of a call for which the user reported the nuisance
+     * status (see {@link TelecomManager#reportNuisanceCallStatus(Uri, boolean)}).  The
+     * {@link CallScreeningService} can use this as a signal for training nuisance detection
+     * algorithms.  The call duration is reported in coarse grained buckets to minimize exposure of
+     * identifying call log information to the {@link CallScreeningService}.
+     * <p>
+     * Indicates the call was greater than 3 seconds, but less than 60 seconds in duration.
+     */
+    public static final int CALL_DURATION_SHORT = 2;
+
+    /**
+     * Call duration reported with {@link #EXTRA_CALL_DURATION} to indicate to the
+     * {@link CallScreeningService} the duration of a call for which the user reported the nuisance
+     * status (see {@link TelecomManager#reportNuisanceCallStatus(Uri, boolean)}).  The
+     * {@link CallScreeningService} can use this as a signal for training nuisance detection
+     * algorithms.  The call duration is reported in coarse grained buckets to minimize exposure of
+     * identifying call log information to the {@link CallScreeningService}.
+     * <p>
+     * Indicates the call was greater than 60 seconds, but less than 120 seconds in duration.
+     */
+    public static final int CALL_DURATION_MEDIUM = 3;
+
+    /**
+     * Call duration reported with {@link #EXTRA_CALL_DURATION} to indicate to the
+     * {@link CallScreeningService} the duration of a call for which the user reported the nuisance
+     * status (see {@link TelecomManager#reportNuisanceCallStatus(Uri, boolean)}).  The
+     * {@link CallScreeningService} can use this as a signal for training nuisance detection
+     * algorithms.  The call duration is reported in coarse grained buckets to minimize exposure of
+     * identifying call log information to the {@link CallScreeningService}.
+     * <p>
+     * Indicates the call was greater than 120 seconds.
+     */
+    public static final int CALL_DURATION_LONG = 4;
+
+    /**
+     * Telecom sends this intent to the {@link CallScreeningService} which the user has chosen to
+     * fill the call screening role when the user indicates through the default dialer whether a
+     * call is a nuisance call or not (see
+     * {@link TelecomManager#reportNuisanceCallStatus(Uri, boolean)}).
+     * <p>
+     * The following extra values are provided for the call:
+     * <ol>
+     *     <li>{@link #EXTRA_CALL_HANDLE} - the handle of the call.</li>
+     *     <li>{@link #EXTRA_IS_NUISANCE} - {@code true} if the user reported the call as a nuisance
+     *     call, {@code false} otherwise.</li>
+     *     <li>{@link #EXTRA_CALL_TYPE} - reports the type of call (incoming, rejected, missed,
+     *     blocked).</li>
+     *     <li>{@link #EXTRA_CALL_DURATION} - the duration of the call (see
+     *     {@link #EXTRA_CALL_DURATION} for valid values).</li>
+     * </ol>
+     * <p>
+     * {@link CallScreeningService} implementations which want to track whether the user reports
+     * calls are nuisance calls should use declare a broadcast receiver in their manifest for this
+     * intent.
+     * <p>
+     * Note: Only {@link CallScreeningService} implementations which have provided
+     * {@link CallIdentification} information for calls at some point will receive this intent.
+     */
+    public static final String ACTION_NUISANCE_CALL_STATUS_CHANGED =
+            "android.telecom.action.NUISANCE_CALL_STATUS_CHANGED";
+
+    /**
+     * Extra used to provide the handle of the call for
+     * {@link #ACTION_NUISANCE_CALL_STATUS_CHANGED}.  The call handle is reported as a
+     * {@link Uri}.
+     */
+    public static final String EXTRA_CALL_HANDLE = "android.telecom.extra.CALL_HANDLE";
+
+    /**
+     * Boolean extra used to indicate whether the user reported a call as a nuisance call.
+     * When {@code true}, the user reported that a call was a nuisance call, {@code false}
+     * otherwise.  Sent with {@link #ACTION_NUISANCE_CALL_STATUS_CHANGED}.
+     */
+    public static final String EXTRA_IS_NUISANCE = "android.telecom.extra.IS_NUISANCE";
+
+    /**
+     * Integer extra used with {@link #ACTION_NUISANCE_CALL_STATUS_CHANGED} to report the type of
+     * call. Valid values are:
+     * <UL>
+     *   <li>{@link android.provider.CallLog.Calls#MISSED_TYPE}</li>
+     *   <li>{@link android.provider.CallLog.Calls#INCOMING_TYPE}</li>
+     *   <li>{@link android.provider.CallLog.Calls#BLOCKED_TYPE}</li>
+     *   <li>{@link android.provider.CallLog.Calls#REJECTED_TYPE}</li>
+     * </UL>
+     */
+    public static final String EXTRA_CALL_TYPE = "android.telecom.extra.CALL_TYPE";
+
+    /**
+     * Integer extra used to with {@link #ACTION_NUISANCE_CALL_STATUS_CHANGED} to report how long
+     * the call lasted.  Valid values are:
+     * <UL>
+     *     <LI>{@link #CALL_DURATION_VERY_SHORT}</LI>
+     *     <LI>{@link #CALL_DURATION_SHORT}</LI>
+     *     <LI>{@link #CALL_DURATION_MEDIUM}</LI>
+     *     <LI>{@link #CALL_DURATION_LONG}</LI>
+     * </UL>
+     */
+    public static final String EXTRA_CALL_DURATION = "android.telecom.extra.CALL_DURATION";
+
     /**
      * The {@link Intent} that must be declared as handled by the service.
      */
diff --git a/telecomm/java/android/telecom/TelecomManager.java b/telecomm/java/android/telecom/TelecomManager.java
index c3e80b4..268e70f 100644
--- a/telecomm/java/android/telecom/TelecomManager.java
+++ b/telecomm/java/android/telecom/TelecomManager.java
@@ -1397,8 +1397,14 @@
      *
      * @return {@code true} if there is a call which will be rejected or terminated, {@code false}
      * otherwise.
+     * @deprecated Companion apps for wearable devices should use the {@link InCallService} API
+     * instead.  Apps performing call screening should use the {@link CallScreeningService} API
+     * instead.
      */
+
+
     @RequiresPermission(Manifest.permission.ANSWER_PHONE_CALLS)
+    @Deprecated
     public boolean endCall() {
         try {
             if (isServiceConnected()) {
@@ -1419,11 +1425,15 @@
      *
      * Requires permission: {@link android.Manifest.permission#MODIFY_PHONE_STATE} or
      * {@link android.Manifest.permission#ANSWER_PHONE_CALLS}
+     *
+     * @deprecated Companion apps for wearable devices should use the {@link InCallService} API
+     * instead.
      */
     //TODO: L-release - need to convert all invocation of ITelecmmService#answerRingingCall to use
     // this method (clockwork & gearhead).
     @RequiresPermission(anyOf =
             {Manifest.permission.ANSWER_PHONE_CALLS, Manifest.permission.MODIFY_PHONE_STATE})
+    @Deprecated
     public void acceptRingingCall() {
         try {
             if (isServiceConnected()) {
@@ -1442,9 +1452,12 @@
      * {@link android.Manifest.permission#ANSWER_PHONE_CALLS}
      *
      * @param videoState The desired video state to answer the call with.
+     * @deprecated Companion apps for wearable devices should use the {@link InCallService} API
+     * instead.
      */
     @RequiresPermission(anyOf =
             {Manifest.permission.ANSWER_PHONE_CALLS, Manifest.permission.MODIFY_PHONE_STATE})
+    @Deprecated
     public void acceptRingingCall(int videoState) {
         try {
             if (isServiceConnected()) {
@@ -1963,6 +1976,33 @@
     }
 
     /**
+     * Called by the default dialer to report to Telecom when the user has marked a previous
+     * incoming call as a nuisance call or not.
+     * <p>
+     * Where the user has chosen a {@link CallScreeningService} to fill the call screening role,
+     * Telecom will notify that {@link CallScreeningService} of the user's report.
+     * <p>
+     * Requires that the caller is the default dialer app.
+     *
+     * @param handle The phone number of an incoming call which the user is reporting as either a
+     *               nuisance of non-nuisance call.
+     * @param isNuisanceCall {@code true} if the user is reporting the call as a nuisance call,
+     *                       {@code false} if the user is reporting the call as a non-nuisance call.
+     */
+    @RequiresPermission(android.Manifest.permission.READ_PHONE_STATE)
+    public void reportNuisanceCallStatus(@NonNull Uri handle, boolean isNuisanceCall) {
+        ITelecomService service = getTelecomService();
+        if (service != null) {
+            try {
+                service.reportNuisanceCallStatus(handle, isNuisanceCall,
+                        mContext.getOpPackageName());
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling ITelecomService#showCallScreen", e);
+            }
+        }
+    }
+
+    /**
      * Handles {@link Intent#ACTION_CALL} intents trampolined from UserCallActivity.
      * @param intent The {@link Intent#ACTION_CALL} intent to handle.
      * @hide
diff --git a/telecomm/java/com/android/internal/telecom/ITelecomService.aidl b/telecomm/java/com/android/internal/telecom/ITelecomService.aidl
index e1d5c17..5030f90 100644
--- a/telecomm/java/com/android/internal/telecom/ITelecomService.aidl
+++ b/telecomm/java/com/android/internal/telecom/ITelecomService.aidl
@@ -285,6 +285,8 @@
      */
     boolean isInEmergencyCall();
 
+    oneway void reportNuisanceCallStatus(in Uri address, boolean isNuisance, String callingPackage);
+
     /**
      * @see TelecomServiceImpl#handleCallIntent
      */
@@ -299,4 +301,5 @@
     void addOrRemoveTestCallCompanionApp(String packageName, boolean isAdded);
 
     void setTestAutoModeApp(String packageName);
+
 }
diff --git a/telephony/java/android/provider/Telephony.java b/telephony/java/android/provider/Telephony.java
index fb8f3e7..ac34cea 100644
--- a/telephony/java/android/provider/Telephony.java
+++ b/telephony/java/android/provider/Telephony.java
@@ -2054,6 +2054,608 @@
     }
 
     /**
+     * Columns for the "rcs_*" tables used by {@link android.telephony.ims.RcsMessageStore} classes.
+     *
+     * @hide - not meant for public use
+     */
+    public interface RcsColumns {
+        /**
+         * The authority for the content provider
+         */
+        String AUTHORITY = "rcs";
+
+        /**
+         * The URI to start building upon to use {@link com.android.providers.telephony.RcsProvider}
+         */
+        Uri CONTENT_AND_AUTHORITY = Uri.parse("content://" + AUTHORITY);
+
+        /**
+         * The value to be used whenever a transaction that expects an integer to be returned
+         * failed.
+         */
+        int TRANSACTION_FAILED = Integer.MIN_VALUE;
+
+        /**
+         * The value that denotes a timestamp was not set before (e.g. a message that is not
+         * delivered yet will not have a DELIVERED_TIMESTAMP)
+         */
+        long TIMESTAMP_NOT_SET = 0;
+
+        /**
+         * The table that {@link android.telephony.ims.RcsThread} gets persisted to
+         */
+        interface RcsThreadColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.RcsThread}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String RCS_THREAD_URI_PART = "thread";
+
+            /**
+             * The URI to query or modify {@link android.telephony.ims.RcsThread} via the content
+             * provider.
+             */
+            Uri RCS_THREAD_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY, RCS_THREAD_URI_PART);
+
+            /**
+             * The unique identifier of an {@link android.telephony.ims.RcsThread}
+             */
+            String RCS_THREAD_ID_COLUMN = "rcs_thread_id";
+        }
+
+        /**
+         * The table that {@link android.telephony.ims.Rcs1To1Thread} gets persisted to
+         */
+        interface Rcs1To1ThreadColumns extends RcsThreadColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.Rcs1To1Thread}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String RCS_1_TO_1_THREAD_URI_PART = "p2p_thread";
+
+            /**
+             * The URI to query or modify {@link android.telephony.ims.Rcs1To1Thread}s via the
+             * content provider
+             */
+            Uri RCS_1_TO_1_THREAD_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY,
+                    RCS_1_TO_1_THREAD_URI_PART);
+
+            /**
+             * The SMS/MMS thread to fallback to in case of an RCS outage
+             */
+            String FALLBACK_THREAD_ID_COLUMN = "rcs_fallback_thread_id";
+        }
+
+        /**
+         * The table that {@link android.telephony.ims.RcsGroupThread} gets persisted to
+         */
+        interface RcsGroupThreadColumns extends RcsThreadColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.RcsGroupThread}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String RCS_GROUP_THREAD_URI_PART = "group_thread";
+
+            /**
+             * The URI to query or modify {@link android.telephony.ims.RcsGroupThread}s via the
+             * content provider
+             */
+            Uri RCS_GROUP_THREAD_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY,
+                    RCS_GROUP_THREAD_URI_PART);
+
+            /**
+             * The owner/admin of the {@link android.telephony.ims.RcsGroupThread}
+             */
+            String OWNER_PARTICIPANT_COLUMN = "owner_participant";
+
+            /**
+             * The user visible name of the group
+             */
+            String GROUP_NAME_COLUMN = "group_name";
+
+            /**
+             * The user visible icon of the group
+             */
+            String GROUP_ICON_COLUMN = "group_icon";
+
+            /**
+             * The RCS conference URI for this group
+             */
+            String CONFERENCE_URI_COLUMN = "conference_uri";
+        }
+
+        /**
+         * The view that enables polling from all types of RCS threads at once
+         */
+        interface RcsUnifiedThreadColumns extends RcsThreadColumns, Rcs1To1ThreadColumns,
+                RcsGroupThreadColumns {
+            /**
+             * The type of this {@link android.telephony.ims.RcsThread}
+             */
+            String THREAD_TYPE_COLUMN = "thread_type";
+
+            /**
+             * Integer returned as a result from a database query that denotes the thread is 1 to 1
+             */
+            int THREAD_TYPE_1_TO_1 = 0;
+
+            /**
+             * Integer returned as a result from a database query that denotes the thread is 1 to 1
+             */
+            int THREAD_TYPE_GROUP = 1;
+        }
+
+        /**
+         * The table that {@link android.telephony.ims.RcsParticipant} gets persisted to
+         */
+        interface RcsParticipantColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.RcsParticipant}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String RCS_PARTICIPANT_URI_PART = "participant";
+
+            /**
+             * The URI to query or modify {@link android.telephony.ims.RcsParticipant}s via the
+             * content provider
+             */
+            Uri RCS_PARTICIPANT_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY,
+                    RCS_PARTICIPANT_URI_PART);
+
+            /**
+             * The unique identifier of the entry in the database
+             */
+            String RCS_PARTICIPANT_ID_COLUMN = "rcs_participant_id";
+
+            /**
+             * A foreign key on canonical_address table, also used by SMS/MMS
+             */
+            String CANONICAL_ADDRESS_ID_COLUMN = "canonical_address_id";
+
+            /**
+             * The user visible RCS alias for this participant.
+             */
+            String RCS_ALIAS_COLUMN = "rcs_alias";
+        }
+
+        /**
+         * Additional constants to enable access to {@link android.telephony.ims.RcsParticipant}
+         * related data
+         */
+        interface RcsParticipantHelpers extends RcsParticipantColumns {
+            /**
+             * The view that unifies "rcs_participant" and "canonical_addresses" tables for easy
+             * access to participant address.
+             */
+            String RCS_PARTICIPANT_WITH_ADDRESS_VIEW = "rcs_participant_with_address_view";
+
+            /**
+             * The view that unifies "rcs_participant", "canonical_addresses" and
+             * "rcs_thread_participant" junction table to get full information on participants that
+             * contribute to threads.
+             */
+            String RCS_PARTICIPANT_WITH_THREAD_VIEW = "rcs_participant_with_thread_view";
+        }
+
+        /**
+         * The table that {@link android.telephony.ims.RcsMessage} gets persisted to
+         */
+        interface RcsMessageColumns {
+            /**
+             * Denotes the type of this message (i.e.
+             * {@link android.telephony.ims.RcsIncomingMessage} or
+             * {@link android.telephony.ims.RcsOutgoingMessage}
+             */
+            String MESSAGE_TYPE_COLUMN = "rcs_message_type";
+
+            /**
+             * The unique identifier for the message in the database - i.e. the primary key.
+             */
+            String MESSAGE_ID_COLUMN = "rcs_message_row_id";
+
+            /**
+             * The globally unique RCS identifier for the message. Please see 4.4.5.2 - GSMA
+             * RCC.53 (RCS Device API 1.6 Specification)
+             */
+            String GLOBAL_ID_COLUMN = "rcs_message_global_id";
+
+            /**
+             * The subscription where this message was sent from/to.
+             */
+            String SUB_ID_COLUMN = "sub_id";
+
+            /**
+             * The sending status of the message.
+             * @see android.telephony.ims.RcsMessage.RcsMessageStatus
+             */
+            String STATUS_COLUMN = "status";
+
+            /**
+             * The creation timestamp of the message.
+             */
+            String ORIGINATION_TIMESTAMP_COLUMN = "origination_timestamp";
+
+            /**
+             * The text content of the message.
+             */
+            String MESSAGE_TEXT_COLUMN = "rcs_text";
+
+            /**
+             * The latitude content of the message, if it contains a location.
+             */
+            String LATITUDE_COLUMN = "latitude";
+
+            /**
+             * The longitude content of the message, if it contains a location.
+             */
+            String LONGITUDE_COLUMN = "longitude";
+        }
+
+        /**
+         * The table that additional information of {@link android.telephony.ims.RcsIncomingMessage}
+         * gets persisted to.
+         */
+        interface RcsIncomingMessageColumns extends RcsMessageColumns {
+            /**
+             The path that should be used for referring to
+             * {@link android.telephony.ims.RcsIncomingMessage}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String INCOMING_MESSAGE_URI_PART = "incoming_message";
+
+            /**
+             * The URI to query incoming messages through
+             * {@link com.android.providers.telephony.RcsProvider}
+             */
+            Uri INCOMING_MESSAGE_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY,
+                    INCOMING_MESSAGE_URI_PART);
+
+            /**
+             * The ID of the {@link android.telephony.ims.RcsParticipant} that sent this message
+             */
+            String SENDER_PARTICIPANT_ID_COLUMN = "sender_participant";
+
+            /**
+             * The timestamp of arrival for this message.
+             */
+            String ARRIVAL_TIMESTAMP_COLUMN = "arrival_timestamp";
+
+            /**
+             * The time when the recipient has read this message.
+             */
+            String SEEN_TIMESTAMP_COLUMN = "seen_timestamp";
+        }
+
+        /**
+         * The table that additional information of {@link android.telephony.ims.RcsOutgoingMessage}
+         * gets persisted to.
+         */
+        interface RcsOutgoingMessageColumns extends RcsMessageColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.RcsOutgoingMessage}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String OUTGOING_MESSAGE_URI_PART = "outgoing_message";
+
+            /**
+             * The URI to query or modify {@link android.telephony.ims.RcsOutgoingMessage}s via the
+             * content provider
+             */
+            Uri OUTGOING_MESSAGE_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY,
+                    OUTGOING_MESSAGE_URI_PART);
+        }
+
+        /**
+         * The delivery information of an {@link android.telephony.ims.RcsOutgoingMessage}
+         */
+        interface RcsMessageDeliveryColumns extends RcsOutgoingMessageColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.RcsOutgoingMessageDelivery}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String DELIVERY_URI_PART = "delivery";
+
+            /**
+             * The timestamp of delivery of this message.
+             */
+            String DELIVERED_TIMESTAMP_COLUMN = "delivered_timestamp";
+
+            /**
+             * The time when the recipient has read this message.
+             */
+            String SEEN_TIMESTAMP_COLUMN = "seen_timestamp";
+        }
+
+        /**
+         * The views that allow querying {@link android.telephony.ims.RcsIncomingMessage} and
+         * {@link android.telephony.ims.RcsOutgoingMessage} at the same time.
+         */
+        interface RcsUnifiedMessageColumns extends RcsIncomingMessageColumns,
+                RcsOutgoingMessageColumns {
+            /**
+             * The path that is used to query all {@link android.telephony.ims.RcsMessage} in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String UNIFIED_MESSAGE_URI_PART = "message";
+
+            /**
+             * The URI to query all types of {@link android.telephony.ims.RcsMessage}s
+             */
+            Uri UNIFIED_MESSAGE_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY,
+                    UNIFIED_MESSAGE_URI_PART);
+
+            /**
+             * The name of the view that unites rcs_message and rcs_incoming_message tables.
+             */
+            String UNIFIED_INCOMING_MESSAGE_VIEW = "unified_incoming_message_view";
+
+            /**
+             * The name of the view that unites rcs_message and rcs_outgoing_message tables.
+             */
+            String UNIFIED_OUTGOING_MESSAGE_VIEW = "unified_outgoing_message_view";
+
+            /**
+             * The column that shows from which table the message entry came from.
+             */
+            String MESSAGE_TYPE_COLUMN = "message_type";
+
+            /**
+             * Integer returned as a result from a database query that denotes that the message is
+             * an incoming message
+             */
+            int MESSAGE_TYPE_INCOMING = 1;
+
+            /**
+             * Integer returned as a result from a database query that denotes that the message is
+             * an outgoing message
+             */
+            int MESSAGE_TYPE_OUTGOING = 0;
+        }
+
+        /**
+         * The table that {@link android.telephony.ims.RcsFileTransferPart} gets persisted to.
+         */
+        interface RcsFileTransferColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.RcsFileTransferPart}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String FILE_TRANSFER_URI_PART = "file_transfer";
+
+            /**
+             * The URI to query or modify {@link android.telephony.ims.RcsFileTransferPart}s via the
+             * content provider
+             */
+            Uri FILE_TRANSFER_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY,
+                    FILE_TRANSFER_URI_PART);
+
+            /**
+             * The globally unique file transfer ID for this RCS file transfer.
+             */
+            String FILE_TRANSFER_ID_COLUMN = "rcs_file_transfer_id";
+
+            /**
+             * The RCS session ID for this file transfer. The ID is implementation dependent but
+             * should be unique.
+             */
+            String SESSION_ID_COLUMN = "session_id";
+
+            /**
+             * The URI that points to the content of this file transfer
+             */
+            String CONTENT_URI_COLUMN = "content_uri";
+
+            /**
+             * The file type of this file transfer in bytes. The validity of types is not enforced
+             * in {@link android.telephony.ims.RcsMessageStore} APIs.
+             */
+            String CONTENT_TYPE_COLUMN = "content_type";
+
+            /**
+             * The size of the file transfer in bytes.
+             */
+            String FILE_SIZE_COLUMN = "file_size";
+
+            /**
+             * Number of bytes that was successfully transmitted for this file transfer
+             */
+            String SUCCESSFULLY_TRANSFERRED_BYTES = "transfer_offset";
+
+            /**
+             * The status of this file transfer
+             * @see android.telephony.ims.RcsFileTransferPart.RcsFileTransferStatus
+             */
+            String TRANSFER_STATUS_COLUMN = "transfer_status";
+
+            /**
+             * The on-screen width of the file transfer, if it contains multi-media
+             */
+            String WIDTH_COLUMN = "width";
+
+            /**
+             * The on-screen height of the file transfer, if it contains multi-media
+             */
+            String HEIGHT_COLUMN = "height";
+
+            /**
+             * The duration of the content in milliseconds if this file transfer contains
+             * multi-media
+             */
+            String DURATION_MILLIS_COLUMN = "duration";
+
+            /**
+             * The URI to the preview of the content of this file transfer
+             */
+            String PREVIEW_URI_COLUMN = "preview_uri";
+
+            /**
+             * The type of the preview of the content of this file transfer. The validity of types
+             * is not enforced in {@link android.telephony.ims.RcsMessageStore} APIs.
+             */
+            String PREVIEW_TYPE_COLUMN = "preview_type";
+        }
+
+        /**
+         * The table that holds the information for
+         * {@link android.telephony.ims.RcsGroupThreadEvent} and its subclasses.
+         */
+        interface RcsThreadEventColumns {
+            /**
+             * The string used in the {@link com.android.providers.telephony.RcsProvider} URI to
+             * refer to participant joined events (example URI:
+             * {@code content://rcs/group_thread/3/participant_joined_event})
+             */
+            String PARTICIPANT_JOINED_URI_PART = "participant_joined_event";
+
+            /**
+             * The string used in the {@link com.android.providers.telephony.RcsProvider} URI to
+             * refer to participant left events. (example URI:
+             * {@code content://rcs/group_thread/3/participant_left_event/4})
+             */
+            String PARTICIPANT_LEFT_URI_PART = "participant_left_event";
+
+            /**
+             * The string used in the {@link com.android.providers.telephony.RcsProvider} URI to
+             * refer to name changed events. (example URI:
+             * {@code content://rcs/group_thread/3/name_changed_event})
+             */
+            String NAME_CHANGED_URI_PART = "name_changed_event";
+
+            /**
+             * The string used in the {@link com.android.providers.telephony.RcsProvider} URI to
+             * refer to icon changed events. (example URI:
+             * {@code content://rcs/group_thread/3/icon_changed_event})
+             */
+            String ICON_CHANGED_URI_PART = "icon_changed_event";
+
+            /**
+             * The unique ID of this event in the database, i.e. the primary key
+             */
+            String EVENT_ID_COLUMN = "event_id";
+
+            /**
+             * The type of this event
+             *
+             * @see RcsEventTypes
+             */
+            String EVENT_TYPE_COLUMN = "event_type";
+
+            /**
+             * The timestamp in milliseconds of when this event happened
+             */
+            String TIMESTAMP_COLUMN = "origination_timestamp";
+
+            /**
+             * The participant that generated this event
+             */
+            String SOURCE_PARTICIPANT_ID_COLUMN = "source_participant";
+
+            /**
+             * The receiving participant of this event if this was an
+             * {@link android.telephony.ims.RcsGroupThreadParticipantJoinedEvent} or
+             * {@link android.telephony.ims.RcsGroupThreadParticipantLeftEvent}
+             */
+            String DESTINATION_PARTICIPANT_ID_COLUMN = "destination_participant";
+
+            /**
+             * The URI for the new icon of the group thread if this was an
+             * {@link android.telephony.ims.RcsGroupThreadIconChangedEvent}
+             */
+            String NEW_ICON_URI_COLUMN = "new_icon_uri";
+
+            /**
+             * The URI for the new name of the group thread if this was an
+             * {@link android.telephony.ims.RcsGroupThreadNameChangedEvent}
+             */
+            String NEW_NAME_COLUMN = "new_name";
+        }
+
+        /**
+         * The table that {@link android.telephony.ims.RcsParticipantAliasChangedEvent} gets
+         * persisted to
+         */
+        interface RcsParticipantEventColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.RcsParticipantAliasChangedEvent}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String ALIAS_CHANGE_EVENT_URI_PART = "alias_change_event";
+
+            /**
+             * The new alias of the participant
+             */
+            String NEW_ALIAS_COLUMN = "new_alias";
+        }
+
+        /**
+         * These values are used in {@link com.android.providers.telephony.RcsProvider} to determine
+         * what kind of event is present in the storage.
+         */
+        interface RcsEventTypes {
+            /**
+             * Integer constant that is stored in the
+             * {@link com.android.providers.telephony.RcsProvider} database that denotes the event
+             * is of type {@link android.telephony.ims.RcsParticipantAliasChangedEvent}
+             */
+            int PARTICIPANT_ALIAS_CHANGED_EVENT_TYPE = 1;
+
+            /**
+             * Integer constant that is stored in the
+             * {@link com.android.providers.telephony.RcsProvider} database that denotes the event
+             * is of type {@link android.telephony.ims.RcsGroupThreadParticipantJoinedEvent}
+             */
+            int PARTICIPANT_JOINED_EVENT_TYPE = 2;
+
+            /**
+             * Integer constant that is stored in the
+             * {@link com.android.providers.telephony.RcsProvider} database that denotes the event
+             * is of type {@link android.telephony.ims.RcsGroupThreadParticipantLeftEvent}
+             */
+            int PARTICIPANT_LEFT_EVENT_TYPE = 4;
+
+            /**
+             * Integer constant that is stored in the
+             * {@link com.android.providers.telephony.RcsProvider} database that denotes the event
+             * is of type {@link android.telephony.ims.RcsGroupThreadIconChangedEvent}
+             */
+            int ICON_CHANGED_EVENT_TYPE = 8;
+
+            /**
+             * Integer constant that is stored in the
+             * {@link com.android.providers.telephony.RcsProvider} database that denotes the event
+             * is of type {@link android.telephony.ims.RcsGroupThreadNameChangedEvent}
+             */
+            int NAME_CHANGED_EVENT_TYPE = 16;
+        }
+
+        /**
+         * The view that allows unified querying across all events
+         */
+        interface RcsUnifiedEventHelper extends RcsParticipantEventColumns, RcsThreadEventColumns {
+            /**
+             * The path that should be used for referring to
+             * {@link android.telephony.ims.RcsEvent}s in
+             * {@link com.android.providers.telephony.RcsProvider} URIs.
+             */
+            String RCS_EVENT_QUERY_URI_PATH = "event";
+
+            /**
+             * The URI to query {@link android.telephony.ims.RcsEvent}s via the content provider.
+             */
+            Uri RCS_EVENT_QUERY_URI = Uri.withAppendedPath(CONTENT_AND_AUTHORITY,
+                    RCS_EVENT_QUERY_URI_PATH);
+        }
+    }
+
+    /**
      * Contains all MMS messages.
      */
     public static final class Mms implements BaseMmsColumns {
diff --git a/telephony/java/android/telephony/AvailableNetworkInfo.java b/telephony/java/android/telephony/AvailableNetworkInfo.java
index 4da79b3..b407b2a 100644
--- a/telephony/java/android/telephony/AvailableNetworkInfo.java
+++ b/telephony/java/android/telephony/AvailableNetworkInfo.java
@@ -114,7 +114,7 @@
         in.readStringList(mMccMncs);
     }
 
-    public AvailableNetworkInfo(int subId, int priority, ArrayList<String> mccMncs) {
+    public AvailableNetworkInfo(int subId, int priority, List<String> mccMncs) {
         mSubId = subId;
         mPriority = priority;
         mMccMncs = new ArrayList<String>(mccMncs);
diff --git a/telephony/java/android/telephony/CallAttributes.java b/telephony/java/android/telephony/CallAttributes.java
index a4cce9c..0d4f09f 100644
--- a/telephony/java/android/telephony/CallAttributes.java
+++ b/telephony/java/android/telephony/CallAttributes.java
@@ -117,9 +117,9 @@
 
         CallAttributes s = (CallAttributes) o;
 
-        return (mPreciseCallState == s.mPreciseCallState
+        return (Objects.equals(mPreciseCallState, s.mPreciseCallState)
                 && mNetworkType == s.mNetworkType
-                && mCallQuality == s.mCallQuality);
+                && Objects.equals(mCallQuality, s.mCallQuality));
     }
 
     /**
diff --git a/telephony/java/android/telephony/CellSignalStrengthNr.java b/telephony/java/android/telephony/CellSignalStrengthNr.java
index 061cd4b..6f84ec5 100644
--- a/telephony/java/android/telephony/CellSignalStrengthNr.java
+++ b/telephony/java/android/telephony/CellSignalStrengthNr.java
@@ -77,6 +77,14 @@
     }
 
     /**
+     * @hide
+     * @param ss signal strength from modem.
+     */
+    public CellSignalStrengthNr(android.hardware.radio.V1_4.NrSignalStrength ss) {
+        this(ss.csiRsrp, ss.csiRsrq, ss.csiSinr, ss.ssRsrp, ss.ssRsrq, ss.ssSinr);
+    }
+
+    /**
      * Reference: 3GPP TS 38.215.
      * Range: -140 dBm to -44 dBm.
      * @return SS reference signal received power, {@link CellInfo#UNAVAILABLE} means unreported
diff --git a/telephony/java/android/telephony/DebugEventReporter.java b/telephony/java/android/telephony/DebugEventReporter.java
new file mode 100644
index 0000000..14b7dd6
--- /dev/null
+++ b/telephony/java/android/telephony/DebugEventReporter.java
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony;
+
+import android.annotation.NonNull;
+import android.annotation.RequiresPermission;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.ParcelUuid;
+
+import com.android.internal.util.IndentingPrintWriter;
+
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+import java.util.List;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * A Simple Surface for Telephony to notify a loosely-coupled debugger of particular issues.
+ *
+ * DebugEventReporter allows an optional external logging component to receive events detected by
+ * the framework and take action. This log surface is designed to provide maximium flexibility
+ * to the receiver of these events. Envisioned use cases of this include notifying a vendor
+ * component of: an event that necessitates (timely) log collection on non-AOSP components;
+ * notifying a vendor component of a rare event that should prompt further action such as a
+ * bug report or user intervention for debug purposes.
+ *
+ * <p>This surface is not intended to enable a diagnostic monitor, nor is it intended to support
+ * streaming logs.
+ *
+ * @hide
+ */
+public final class DebugEventReporter {
+    private static final String TAG = "DebugEventReporter";
+
+    private static Context sContext = null;
+
+    private static Map<UUID, Integer> sEvents = new ConcurrentHashMap<>();
+
+    /*
+     * Because this is only supporting system packages, once we find a package, it will be the
+     * same package until the next system upgrade. Thus, to save time in processing debug events
+     * we can cache this info and skip the resolution process after it's done the first time.
+     */
+    private static String sDebugPackageName = null;
+
+    private DebugEventReporter() {};
+
+    /**
+     * If enabled, build and send an intent to a Debug Service for logging.
+     *
+     * This method sends the {@link TelephonyManager#DEBUG_EVENT DEBUG_EVENT} broadcast, which is
+     * system protected. Invoking this method unless you are the system will result in an error.
+     *
+     * @param eventId a fixed event ID that will be sent for each instance of the same event. This
+     *        ID should be generated randomly.
+     * @param description an optional description, that if included will be used as the subject for
+     *        identification and discussion of this event. This description should ideally be
+     *        static and must not contain any sensitive information (especially PII).
+     */
+    public static void sendEvent(@NonNull UUID eventId, String description) {
+        if (sContext == null) {
+            Rlog.w(TAG, "DebugEventReporter not yet initialized, dropping event=" + eventId);
+            return;
+        }
+
+        // If this event has already occurred, skip sending intents for it; regardless log its
+        // invocation here.
+        Integer count = sEvents.containsKey(eventId) ? sEvents.get(eventId) + 1 : 1;
+        sEvents.put(eventId, count);
+        if (count > 1) return;
+
+        // Even if we are initialized, that doesn't mean that a package name has been found.
+        // This is normal in many cases, such as when no debug package is installed on the system,
+        // so drop these events silently.
+        if (sDebugPackageName == null) return;
+
+        Intent dbgIntent = new Intent(TelephonyManager.ACTION_DEBUG_EVENT);
+        dbgIntent.putExtra(TelephonyManager.EXTRA_DEBUG_EVENT_ID, new ParcelUuid(eventId));
+        if (description != null) {
+            dbgIntent.putExtra(TelephonyManager.EXTRA_DEBUG_EVENT_DESCRIPTION, description);
+        }
+        dbgIntent.setPackage(sDebugPackageName);
+        sContext.sendBroadcast(dbgIntent, android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE);
+    }
+
+    /**
+     * Initialize the DebugEventReporter with the current context.
+     *
+     * This method must be invoked before any calls to sendEvent() will succeed. This method should
+     * only be invoked at most once.
+     *
+     * @param context a Context object used to initialize this singleton DebugEventReporter in
+     *        the current process.
+     */
+    @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE)
+    public static void initialize(@NonNull Context context) {
+        if (context == null) {
+            throw new IllegalArgumentException("DebugEventReporter needs a non-null context.");
+        }
+
+        // Ensure that this context has sufficient permissions to send debug events.
+        context.enforceCallingOrSelfPermission(android.Manifest.permission.MODIFY_PHONE_STATE,
+                "This app does not have privileges to send debug events");
+
+        sContext = context;
+
+        // Check to see if there is a valid debug package; if there are multiple, that's a config
+        // error, so just take the first one.
+        PackageManager pm = sContext.getPackageManager();
+        if (pm == null) return;
+        List<ResolveInfo> packages = pm.queryBroadcastReceivers(
+                new Intent(TelephonyManager.ACTION_DEBUG_EVENT),
+                PackageManager.MATCH_SYSTEM_ONLY
+                        | PackageManager.MATCH_DIRECT_BOOT_AWARE
+                        | PackageManager.MATCH_DIRECT_BOOT_UNAWARE);
+        if (packages == null || packages.isEmpty()) return;
+        if (packages.size() > 1) {
+            Rlog.e(TAG, "Multiple DebugEvent Receivers installed.");
+        }
+
+        for (ResolveInfo r : packages) {
+            if (r.activityInfo == null
+                    || pm.checkPermission(
+                            android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE,
+                            r.activityInfo.packageName)
+                    != PackageManager.PERMISSION_GRANTED) {
+                Rlog.w(TAG,
+                        "Found package without proper permissions or no activity"
+                                + r.activityInfo.packageName);
+                continue;
+            }
+            Rlog.d(TAG, "Found a valid package " + r.activityInfo.packageName);
+            sDebugPackageName = r.activityInfo.packageName;
+            break;
+        }
+        // Initialization may only be performed once.
+    }
+
+    /** Dump the contents of the DebugEventReporter */
+    public static void dump(FileDescriptor fd, PrintWriter printWriter, String[] args) {
+        if (sContext == null) return;
+        IndentingPrintWriter pw = new IndentingPrintWriter(printWriter, "  ");
+        sContext.enforceCallingOrSelfPermission(android.Manifest.permission.DUMP, "Requires DUMP");
+        pw.println("Initialized=" + (sContext != null ? "Yes" : "No"));
+        pw.println("Debug Package=" + sDebugPackageName);
+        pw.println("Event Counts:");
+        pw.increaseIndent();
+        for (UUID event : sEvents.keySet()) {
+            pw.println(event + ": " + sEvents.get(event));
+        }
+        pw.decreaseIndent();
+        pw.flush();
+    }
+}
diff --git a/telephony/java/android/telephony/PreciseCallState.java b/telephony/java/android/telephony/PreciseCallState.java
index 59f3e1f..19e1931 100644
--- a/telephony/java/android/telephony/PreciseCallState.java
+++ b/telephony/java/android/telephony/PreciseCallState.java
@@ -287,11 +287,11 @@
             return false;
         }
         PreciseCallState other = (PreciseCallState) obj;
-        return (mRingingCallState != other.mRingingCallState &&
-            mForegroundCallState != other.mForegroundCallState &&
-            mBackgroundCallState != other.mBackgroundCallState &&
-            mDisconnectCause != other.mDisconnectCause &&
-            mPreciseDisconnectCause != other.mPreciseDisconnectCause);
+        return (mRingingCallState == other.mRingingCallState
+                && mForegroundCallState == other.mForegroundCallState
+                && mBackgroundCallState == other.mBackgroundCallState
+                && mDisconnectCause == other.mDisconnectCause
+                && mPreciseDisconnectCause == other.mPreciseDisconnectCause);
     }
 
     @Override
diff --git a/telephony/java/android/telephony/RadioAccessFamily.java b/telephony/java/android/telephony/RadioAccessFamily.java
index f63b753..0d94c4d 100644
--- a/telephony/java/android/telephony/RadioAccessFamily.java
+++ b/telephony/java/android/telephony/RadioAccessFamily.java
@@ -57,6 +57,9 @@
     public static final int RAF_LTE = TelephonyManager.NETWORK_TYPE_BITMASK_LTE;
     public static final int RAF_LTE_CA = TelephonyManager.NETWORK_TYPE_BITMASK_LTE_CA;
 
+    // 5G
+    public static final int RAF_NR = TelephonyManager.NETWORK_TYPE_BITMASK_NR;
+
     // Grouping of RAFs
     // 2G
     private static final int GSM = RAF_GSM | RAF_GPRS | RAF_EDGE;
@@ -68,6 +71,9 @@
     // 4G
     private static final int LTE = RAF_LTE | RAF_LTE_CA;
 
+    // 5G
+    private static final int NR = RAF_NR;
+
     /* Phone ID of phone */
     private int mPhoneId;
 
@@ -160,84 +166,78 @@
 
     @UnsupportedAppUsage
     public static int getRafFromNetworkType(int type) {
-        int raf;
-
         switch (type) {
             case RILConstants.NETWORK_MODE_WCDMA_PREF:
-                raf = GSM | WCDMA;
-                break;
+                return GSM | WCDMA;
             case RILConstants.NETWORK_MODE_GSM_ONLY:
-                raf = GSM;
-                break;
+                return GSM;
             case RILConstants.NETWORK_MODE_WCDMA_ONLY:
-                raf = WCDMA;
-                break;
+                return WCDMA;
             case RILConstants.NETWORK_MODE_GSM_UMTS:
-                raf = GSM | WCDMA;
-                break;
+                return GSM | WCDMA;
             case RILConstants.NETWORK_MODE_CDMA:
-                raf = CDMA | EVDO;
-                break;
+                return CDMA | EVDO;
             case RILConstants.NETWORK_MODE_LTE_CDMA_EVDO:
-                raf = LTE | CDMA | EVDO;
-                break;
+                return LTE | CDMA | EVDO;
             case RILConstants.NETWORK_MODE_LTE_GSM_WCDMA:
-                raf = LTE | GSM | WCDMA;
-                break;
+                return LTE | GSM | WCDMA;
             case RILConstants.NETWORK_MODE_LTE_CDMA_EVDO_GSM_WCDMA:
-                raf = LTE | CDMA | EVDO | GSM | WCDMA;
-                break;
+                return LTE | CDMA | EVDO | GSM | WCDMA;
             case RILConstants.NETWORK_MODE_LTE_ONLY:
-                raf = LTE;
-                break;
+                return LTE;
             case RILConstants.NETWORK_MODE_LTE_WCDMA:
-                raf = LTE | WCDMA;
-                break;
+                return LTE | WCDMA;
             case RILConstants.NETWORK_MODE_CDMA_NO_EVDO:
-                raf = CDMA;
-                break;
+                return CDMA;
             case RILConstants.NETWORK_MODE_EVDO_NO_CDMA:
-                raf = EVDO;
-                break;
+                return EVDO;
             case RILConstants.NETWORK_MODE_GLOBAL:
-                raf = GSM | WCDMA | CDMA | EVDO;
-                break;
+                return GSM | WCDMA | CDMA | EVDO;
             case RILConstants.NETWORK_MODE_TDSCDMA_ONLY:
-                raf = RAF_TD_SCDMA;
-                break;
+                return RAF_TD_SCDMA;
             case RILConstants.NETWORK_MODE_TDSCDMA_WCDMA:
-                raf = RAF_TD_SCDMA | WCDMA;
-                break;
+                return RAF_TD_SCDMA | WCDMA;
             case RILConstants.NETWORK_MODE_LTE_TDSCDMA:
-                raf = LTE | RAF_TD_SCDMA;
-                break;
+                return LTE | RAF_TD_SCDMA;
             case RILConstants.NETWORK_MODE_TDSCDMA_GSM:
-                raf = RAF_TD_SCDMA | GSM;
-                break;
+                return RAF_TD_SCDMA | GSM;
             case RILConstants.NETWORK_MODE_LTE_TDSCDMA_GSM:
-                raf = LTE | RAF_TD_SCDMA | GSM;
-                break;
+                return LTE | RAF_TD_SCDMA | GSM;
             case RILConstants.NETWORK_MODE_TDSCDMA_GSM_WCDMA:
-                raf = RAF_TD_SCDMA | GSM | WCDMA;
-                break;
+                return RAF_TD_SCDMA | GSM | WCDMA;
             case RILConstants.NETWORK_MODE_LTE_TDSCDMA_WCDMA:
-                raf = LTE | RAF_TD_SCDMA | WCDMA;
-                break;
+                return LTE | RAF_TD_SCDMA | WCDMA;
             case RILConstants.NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA:
-                raf = LTE | RAF_TD_SCDMA | GSM | WCDMA;
-                break;
+                return LTE | RAF_TD_SCDMA | GSM | WCDMA;
             case RILConstants.NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA:
-                raf = RAF_TD_SCDMA | CDMA | EVDO | GSM | WCDMA;
-                break;
+                return RAF_TD_SCDMA | CDMA | EVDO | GSM | WCDMA;
             case RILConstants.NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA:
-                raf = LTE | RAF_TD_SCDMA | CDMA | EVDO | GSM | WCDMA;
-                break;
+                return LTE | RAF_TD_SCDMA | CDMA | EVDO | GSM | WCDMA;
+            case (RILConstants.NETWORK_MODE_NR_ONLY):
+                return NR;
+            case (RILConstants.NETWORK_MODE_NR_LTE):
+                return NR | LTE;
+            case (RILConstants.NETWORK_MODE_NR_LTE_CDMA_EVDO):
+                return NR | LTE | CDMA | EVDO;
+            case (RILConstants.NETWORK_MODE_NR_LTE_GSM_WCDMA):
+                return NR | LTE | GSM | WCDMA;
+            case (RILConstants.NETWORK_MODE_NR_LTE_CDMA_EVDO_GSM_WCDMA):
+                return NR | LTE | CDMA | EVDO | GSM | WCDMA;
+            case (RILConstants.NETWORK_MODE_NR_LTE_WCDMA):
+                return NR | LTE | WCDMA;
+            case (RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA):
+                return NR | LTE | RAF_TD_SCDMA;
+            case (RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_GSM):
+                return NR | LTE | RAF_TD_SCDMA | GSM;
+            case (RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_WCDMA):
+                return NR | LTE | RAF_TD_SCDMA | WCDMA;
+            case (RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_GSM_WCDMA):
+                return NR | LTE | RAF_TD_SCDMA | GSM | WCDMA;
+            case (RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA):
+                return NR | LTE | RAF_TD_SCDMA | CDMA | EVDO | GSM | WCDMA;
             default:
-                raf = RAF_UNKNOWN;
-                break;
+                return RAF_UNKNOWN;
         }
-
-        return raf;
     }
 
     /**
@@ -250,6 +250,7 @@
         raf = ((CDMA & raf) > 0) ? (CDMA | raf) : raf;
         raf = ((EVDO & raf) > 0) ? (EVDO | raf) : raf;
         raf = ((LTE & raf) > 0) ? (LTE | raf) : raf;
+        raf = ((NR & raf) > 0) ? (NR | raf) : raf;
 
         return raf;
     }
@@ -274,83 +275,78 @@
 
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
     public static int getNetworkTypeFromRaf(int raf) {
-        int type;
-
         raf = getAdjustedRaf(raf);
 
         switch (raf) {
             case (GSM | WCDMA):
-                type = RILConstants.NETWORK_MODE_WCDMA_PREF;
-                break;
+                return RILConstants.NETWORK_MODE_WCDMA_PREF;
             case GSM:
-                type = RILConstants.NETWORK_MODE_GSM_ONLY;
-                break;
+                return RILConstants.NETWORK_MODE_GSM_ONLY;
             case WCDMA:
-                type = RILConstants.NETWORK_MODE_WCDMA_ONLY;
-                break;
+                return RILConstants.NETWORK_MODE_WCDMA_ONLY;
             case (CDMA | EVDO):
-                type = RILConstants.NETWORK_MODE_CDMA;
-                break;
+                return RILConstants.NETWORK_MODE_CDMA;
             case (LTE | CDMA | EVDO):
-                type = RILConstants.NETWORK_MODE_LTE_CDMA_EVDO;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_CDMA_EVDO;
             case (LTE | GSM | WCDMA):
-                type = RILConstants.NETWORK_MODE_LTE_GSM_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_GSM_WCDMA;
             case (LTE | CDMA | EVDO | GSM | WCDMA):
-                type = RILConstants.NETWORK_MODE_LTE_CDMA_EVDO_GSM_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_CDMA_EVDO_GSM_WCDMA;
             case LTE:
-                type = RILConstants.NETWORK_MODE_LTE_ONLY;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_ONLY;
             case (LTE | WCDMA):
-                type = RILConstants.NETWORK_MODE_LTE_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_WCDMA;
             case CDMA:
-                type = RILConstants.NETWORK_MODE_CDMA_NO_EVDO;
-                break;
+                return RILConstants.NETWORK_MODE_CDMA_NO_EVDO;
             case EVDO:
-                type = RILConstants.NETWORK_MODE_EVDO_NO_CDMA;
-                break;
+                return RILConstants.NETWORK_MODE_EVDO_NO_CDMA;
             case (GSM | WCDMA | CDMA | EVDO):
-                type = RILConstants.NETWORK_MODE_GLOBAL;
-                break;
+                return RILConstants.NETWORK_MODE_GLOBAL;
             case RAF_TD_SCDMA:
-                type = RILConstants.NETWORK_MODE_TDSCDMA_ONLY;
-                break;
+                return RILConstants.NETWORK_MODE_TDSCDMA_ONLY;
             case (RAF_TD_SCDMA | WCDMA):
-                type = RILConstants.NETWORK_MODE_TDSCDMA_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_TDSCDMA_WCDMA;
             case (LTE | RAF_TD_SCDMA):
-                type = RILConstants.NETWORK_MODE_LTE_TDSCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_TDSCDMA;
             case (RAF_TD_SCDMA | GSM):
-                type = RILConstants.NETWORK_MODE_TDSCDMA_GSM;
-                break;
+                return RILConstants.NETWORK_MODE_TDSCDMA_GSM;
             case (LTE | RAF_TD_SCDMA | GSM):
-                type = RILConstants.NETWORK_MODE_LTE_TDSCDMA_GSM;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_TDSCDMA_GSM;
             case (RAF_TD_SCDMA | GSM | WCDMA):
-                type = RILConstants.NETWORK_MODE_TDSCDMA_GSM_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_TDSCDMA_GSM_WCDMA;
             case (LTE | RAF_TD_SCDMA | WCDMA):
-                type = RILConstants.NETWORK_MODE_LTE_TDSCDMA_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_TDSCDMA_WCDMA;
             case (LTE | RAF_TD_SCDMA | GSM | WCDMA):
-                type = RILConstants.NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA;
             case (RAF_TD_SCDMA | CDMA | EVDO | GSM | WCDMA):
-                type = RILConstants.NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA;
             case (LTE | RAF_TD_SCDMA | CDMA | EVDO | GSM | WCDMA):
-                type = RILConstants.NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA;
-                break;
+                return RILConstants.NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA;
+            case (NR):
+                return RILConstants.NETWORK_MODE_NR_ONLY;
+            case (NR | LTE):
+                return RILConstants.NETWORK_MODE_NR_LTE;
+            case (NR | LTE | CDMA | EVDO):
+                return RILConstants.NETWORK_MODE_NR_LTE_CDMA_EVDO;
+            case (NR | LTE | GSM | WCDMA):
+                return RILConstants.NETWORK_MODE_NR_LTE_GSM_WCDMA;
+            case (NR | LTE | CDMA | EVDO | GSM | WCDMA):
+                return RILConstants.NETWORK_MODE_NR_LTE_CDMA_EVDO_GSM_WCDMA;
+            case (NR | LTE | WCDMA):
+                return RILConstants.NETWORK_MODE_NR_LTE_WCDMA;
+            case (NR | LTE | RAF_TD_SCDMA):
+                return RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA;
+            case (NR | LTE | RAF_TD_SCDMA | GSM):
+                return RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_GSM;
+            case (NR | LTE | RAF_TD_SCDMA | WCDMA):
+                return RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_WCDMA;
+            case (NR | LTE | RAF_TD_SCDMA | GSM | WCDMA):
+                return RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_GSM_WCDMA;
+            case (NR | LTE | RAF_TD_SCDMA | CDMA | EVDO | GSM | WCDMA):
+                return RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA;
             default:
-                type = RILConstants.PREFERRED_NETWORK_MODE ;
-                break;
+                return RILConstants.PREFERRED_NETWORK_MODE;
         }
-
-        return type;
     }
 
     public static int singleRafTypeFromString(String rafString) {
@@ -377,6 +373,7 @@
             case "EVDO":    return EVDO;
             case "WCDMA":   return WCDMA;
             case "LTE_CA":  return RAF_LTE_CA;
+            case "NR":      return RAF_NR;
             default:        return RAF_UNKNOWN;
         }
     }
diff --git a/telephony/java/android/telephony/SignalStrength.java b/telephony/java/android/telephony/SignalStrength.java
index 91375bc..d2ae106 100644
--- a/telephony/java/android/telephony/SignalStrength.java
+++ b/telephony/java/android/telephony/SignalStrength.java
@@ -85,6 +85,7 @@
     CellSignalStrengthWcdma mWcdma;
     CellSignalStrengthTdscdma mTdscdma;
     CellSignalStrengthLte mLte;
+    CellSignalStrengthNr mNr;
 
     /**
      * Create a new SignalStrength from a intent notifier Bundle
@@ -116,7 +117,7 @@
     public SignalStrength() {
         this(new CellSignalStrengthCdma(), new CellSignalStrengthGsm(),
                 new CellSignalStrengthWcdma(), new CellSignalStrengthTdscdma(),
-                new CellSignalStrengthLte());
+                new CellSignalStrengthLte(), new CellSignalStrengthNr());
     }
 
     /**
@@ -129,12 +130,14 @@
             @NonNull CellSignalStrengthGsm gsm,
             @NonNull CellSignalStrengthWcdma wcdma,
             @NonNull CellSignalStrengthTdscdma tdscdma,
-            @NonNull CellSignalStrengthLte lte) {
+            @NonNull CellSignalStrengthLte lte,
+            @NonNull CellSignalStrengthNr nr) {
         mCdma = cdma;
         mGsm = gsm;
         mWcdma = wcdma;
         mTdscdma = tdscdma;
         mLte = lte;
+        mNr = nr;
     }
 
     /**
@@ -147,7 +150,8 @@
                 new CellSignalStrengthGsm(signalStrength.gw),
                 new CellSignalStrengthWcdma(),
                 new CellSignalStrengthTdscdma(signalStrength.tdScdma),
-                new CellSignalStrengthLte(signalStrength.lte));
+                new CellSignalStrengthLte(signalStrength.lte),
+                new CellSignalStrengthNr());
     }
 
     /**
@@ -160,7 +164,23 @@
                 new CellSignalStrengthGsm(signalStrength.gsm),
                 new CellSignalStrengthWcdma(signalStrength.wcdma),
                 new CellSignalStrengthTdscdma(signalStrength.tdScdma),
-                new CellSignalStrengthLte(signalStrength.lte));
+                new CellSignalStrengthLte(signalStrength.lte),
+                new CellSignalStrengthNr());
+    }
+
+    /**
+     * Constructor for Radio HAL V1.4.
+     *
+     * @param signalStrength signal strength reported from modem.
+     * @hide
+     */
+    public SignalStrength(android.hardware.radio.V1_4.SignalStrength signalStrength) {
+        this(new CellSignalStrengthCdma(signalStrength.cdma, signalStrength.evdo),
+                new CellSignalStrengthGsm(signalStrength.gsm),
+                new CellSignalStrengthWcdma(signalStrength.wcdma),
+                new CellSignalStrengthTdscdma(signalStrength.tdscdma),
+                new CellSignalStrengthLte(signalStrength.lte),
+                new CellSignalStrengthNr(signalStrength.nr));
     }
 
     private CellSignalStrength getPrimary() {
@@ -171,6 +191,7 @@
         if (mTdscdma.isValid()) return mTdscdma;
         if (mWcdma.isValid()) return mWcdma;
         if (mGsm.isValid()) return mGsm;
+        if (mNr.isValid()) return mNr;
         return mLte;
     }
 
@@ -200,6 +221,7 @@
         if (mTdscdma.isValid()) cssList.add(mTdscdma);
         if (mWcdma.isValid()) cssList.add(mWcdma);
         if (mGsm.isValid()) cssList.add(mGsm);
+        if (mNr.isValid()) cssList.add(mNr);
         return cssList;
     }
 
@@ -210,6 +232,7 @@
         mWcdma.updateLevel(cc, ss);
         mTdscdma.updateLevel(cc, ss);
         mLte.updateLevel(cc, ss);
+        mNr.updateLevel(cc, ss);
     }
 
     /**
@@ -234,6 +257,7 @@
         mWcdma = new CellSignalStrengthWcdma(s.mWcdma);
         mTdscdma = new CellSignalStrengthTdscdma(s.mTdscdma);
         mLte = new CellSignalStrengthLte(s.mLte);
+        mNr = new CellSignalStrengthNr(s.mNr);
     }
 
     /**
@@ -250,6 +274,7 @@
         mWcdma = in.readParcelable(CellSignalStrengthWcdma.class.getClassLoader());
         mTdscdma = in.readParcelable(CellSignalStrengthTdscdma.class.getClassLoader());
         mLte = in.readParcelable(CellSignalStrengthLte.class.getClassLoader());
+        mNr = in.readParcelable(CellSignalStrengthLte.class.getClassLoader());
     }
 
     /**
@@ -261,6 +286,7 @@
         out.writeParcelable(mWcdma, flags);
         out.writeParcelable(mTdscdma, flags);
         out.writeParcelable(mLte, flags);
+        out.writeParcelable(mNr, flags);
     }
 
     /**
@@ -814,7 +840,7 @@
      */
     @Override
     public int hashCode() {
-        return Objects.hash(mCdma, mGsm, mWcdma, mTdscdma, mLte);
+        return Objects.hash(mCdma, mGsm, mWcdma, mTdscdma, mLte, mNr);
     }
 
     /**
@@ -830,7 +856,8 @@
             && mGsm.equals(s.mGsm)
             && mWcdma.equals(s.mWcdma)
             && mTdscdma.equals(s.mTdscdma)
-            && mLte.equals(s.mLte);
+            && mLte.equals(s.mLte)
+            && mNr.equals(s.mNr);
     }
 
     /**
@@ -844,6 +871,7 @@
             .append(",mWcdma=").append(mWcdma)
             .append(",mTdscdma=").append(mTdscdma)
             .append(",mLte=").append(mLte)
+            .append(",mNr=").append(mNr)
             .append(",primary=").append(getPrimary().getClass().getSimpleName())
             .append("}")
             .toString();
@@ -866,6 +894,7 @@
         mWcdma = m.getParcelable("Wcdma");
         mTdscdma = m.getParcelable("Tdscdma");
         mLte = m.getParcelable("Lte");
+        mNr = m.getParcelable("Nr");
     }
 
     /**
@@ -885,6 +914,7 @@
         m.putParcelable("Wcdma", mWcdma);
         m.putParcelable("Tdscdma", mTdscdma);
         m.putParcelable("Lte", mLte);
+        m.putParcelable("Nr", mNr);
     }
 
     /**
diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index 24d790a..148563a 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -1341,6 +1341,38 @@
     @SystemApi
     public static final long MAX_NUMBER_VERIFICATION_TIMEOUT_MILLIS = 60000;
 
+    /**
+     * Intent sent when an error occurs that debug tools should log and possibly take further
+     * action such as capturing vendor-specific logs.
+     *
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
+    public static final String ACTION_DEBUG_EVENT = "android.telephony.action.DEBUG_EVENT";
+
+    /**
+     * An arbitrary ParcelUuid which should be consistent for each occurrence of the same event.
+     *
+     * This field must be included in all events.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final String EXTRA_DEBUG_EVENT_ID = "android.telephony.extra.DEBUG_EVENT_ID";
+
+    /**
+     * A freeform string description of the event.
+     *
+     * This field is optional for all events and as a guideline should not exceed 80 characters
+     * and should be as short as possible to convey the essence of the event.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static final String EXTRA_DEBUG_EVENT_DESCRIPTION =
+            "android.telephony.extra.DEBUG_EVENT_DESCRIPTION";
+
     //
     //
     // Device Info
@@ -6236,197 +6268,258 @@
             NETWORK_MODE_LTE_TDSCDMA_WCDMA,
             NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA,
             NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA,
-            NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA
+            NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA,
+            NETWORK_MODE_NR_ONLY,
+            NETWORK_MODE_NR_LTE,
+            NETWORK_MODE_NR_LTE_CDMA_EVDO,
+            NETWORK_MODE_NR_LTE_GSM_WCDMA,
+            NETWORK_MODE_NR_LTE_CDMA_EVDO_GSM_WCDMA,
+            NETWORK_MODE_NR_LTE_WCDMA,
+            NETWORK_MODE_NR_LTE_TDSCDMA,
+            NETWORK_MODE_NR_LTE_TDSCDMA_GSM,
+            NETWORK_MODE_NR_LTE_TDSCDMA_WCDMA,
+            NETWORK_MODE_NR_LTE_TDSCDMA_GSM_WCDMA,
+            NETWORK_MODE_NR_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA
     })
     @Retention(RetentionPolicy.SOURCE)
     public @interface PrefNetworkMode{}
 
     /**
-     * network mode is GSM/WCDMA (WCDMA preferred).
+     * Preferred network mode is GSM/WCDMA (WCDMA preferred).
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_WCDMA_PREF = RILConstants.NETWORK_MODE_WCDMA_PREF;
 
     /**
-     * network mode is GSM only.
+     * Preferred network mode is GSM only.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_GSM_ONLY = RILConstants.NETWORK_MODE_GSM_ONLY;
 
     /**
-     * network mode is WCDMA only.
+     * Preferred network mode is WCDMA only.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_WCDMA_ONLY = RILConstants.NETWORK_MODE_WCDMA_ONLY;
 
     /**
-     * network mode is GSM/WCDMA (auto mode, according to PRL).
+     * Preferred network mode is GSM/WCDMA (auto mode, according to PRL).
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_GSM_UMTS = RILConstants.NETWORK_MODE_GSM_UMTS;
 
     /**
-     * network mode is CDMA and EvDo (auto mode, according to PRL).
+     * Preferred network mode is CDMA and EvDo (auto mode, according to PRL).
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_CDMA_EVDO = RILConstants.NETWORK_MODE_CDMA;
 
     /**
-     * network mode is CDMA only.
+     * Preferred network mode is CDMA only.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_CDMA_NO_EVDO = RILConstants.NETWORK_MODE_CDMA_NO_EVDO;
 
     /**
-     * network mode is EvDo only.
+     * Preferred network mode is EvDo only.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_EVDO_NO_CDMA = RILConstants.NETWORK_MODE_EVDO_NO_CDMA;
 
     /**
-     * network mode is GSM/WCDMA, CDMA, and EvDo (auto mode, according to PRL).
+     * Preferred network mode is GSM/WCDMA, CDMA, and EvDo (auto mode, according to PRL).
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_GLOBAL = RILConstants.NETWORK_MODE_GLOBAL;
 
     /**
-     * network mode is LTE, CDMA and EvDo.
+     * Preferred network mode is LTE, CDMA and EvDo.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_CDMA_EVDO = RILConstants.NETWORK_MODE_LTE_CDMA_EVDO;
 
     /**
-     * preferred network mode is LTE, GSM/WCDMA.
+     * Preferred network mode is LTE, GSM/WCDMA.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_GSM_WCDMA = RILConstants.NETWORK_MODE_LTE_GSM_WCDMA;
 
     /**
-     * network mode is LTE, CDMA, EvDo, GSM/WCDMA.
+     * Preferred network mode is LTE, CDMA, EvDo, GSM/WCDMA.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_CDMA_EVDO_GSM_WCDMA =
             RILConstants.NETWORK_MODE_LTE_CDMA_EVDO_GSM_WCDMA;
 
     /**
-     * network mode is LTE Only.
+     * Preferred network mode is LTE Only.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_ONLY = RILConstants.NETWORK_MODE_LTE_ONLY;
 
     /**
-     * network mode is LTE/WCDMA.
+     * Preferred network mode is LTE/WCDMA.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_WCDMA = RILConstants.NETWORK_MODE_LTE_WCDMA;
 
     /**
-     * network mode is TD-SCDMA only.
+     * Preferred network mode is TD-SCDMA only.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_TDSCDMA_ONLY = RILConstants.NETWORK_MODE_TDSCDMA_ONLY;
 
     /**
-     * network mode is TD-SCDMA and WCDMA.
+     * Preferred network mode is TD-SCDMA and WCDMA.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_TDSCDMA_WCDMA = RILConstants.NETWORK_MODE_TDSCDMA_WCDMA;
 
     /**
-     * network mode is TD-SCDMA and LTE.
+     * Preferred network mode is TD-SCDMA and LTE.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_TDSCDMA = RILConstants.NETWORK_MODE_LTE_TDSCDMA;
 
     /**
-     * network mode is TD-SCDMA and GSM.
+     * Preferred network mode is TD-SCDMA and GSM.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_TDSCDMA_GSM = RILConstants.NETWORK_MODE_TDSCDMA_GSM;
 
     /**
-     * network mode is TD-SCDMA,GSM and LTE.
+     * Preferred network mode is TD-SCDMA,GSM and LTE.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_TDSCDMA_GSM =
             RILConstants.NETWORK_MODE_LTE_TDSCDMA_GSM;
 
     /**
-     * network mode is TD-SCDMA, GSM/WCDMA.
+     * Preferred network mode is TD-SCDMA, GSM/WCDMA.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_TDSCDMA_GSM_WCDMA =
             RILConstants.NETWORK_MODE_TDSCDMA_GSM_WCDMA;
 
     /**
-     * network mode is TD-SCDMA, WCDMA and LTE.
+     * Preferred network mode is TD-SCDMA, WCDMA and LTE.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_TDSCDMA_WCDMA =
             RILConstants.NETWORK_MODE_LTE_TDSCDMA_WCDMA;
 
     /**
-     * network mode is TD-SCDMA, GSM/WCDMA and LTE.
+     * Preferred network mode is TD-SCDMA, GSM/WCDMA and LTE.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA =
             RILConstants.NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA;
 
     /**
-     * network mode is TD-SCDMA,EvDo,CDMA,GSM/WCDMA.
+     * Preferred network mode is TD-SCDMA,EvDo,CDMA,GSM/WCDMA.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA =
             RILConstants.NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA;
-
     /**
-     * network mode is TD-SCDMA/LTE/GSM/WCDMA, CDMA, and EvDo.
+     * Preferred network mode is TD-SCDMA/LTE/GSM/WCDMA, CDMA, and EvDo.
      * @hide
      */
-    @SystemApi
     public static final int NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA =
             RILConstants.NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA;
 
     /**
+     * Preferred network mode is NR 5G only.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_ONLY = RILConstants.NETWORK_MODE_NR_ONLY;
+
+    /**
+     * Preferred network mode is NR 5G, LTE.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE = RILConstants.NETWORK_MODE_NR_LTE;
+
+    /**
+     * Preferred network mode is NR 5G, LTE, CDMA and EvDo.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_CDMA_EVDO =
+            RILConstants.NETWORK_MODE_NR_LTE_CDMA_EVDO;
+
+    /**
+     * Preferred network mode is NR 5G, LTE, GSM and WCDMA.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_GSM_WCDMA =
+            RILConstants.NETWORK_MODE_NR_LTE_GSM_WCDMA;
+
+    /**
+     * Preferred network mode is NR 5G, LTE, CDMA, EvDo, GSM and WCDMA.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_CDMA_EVDO_GSM_WCDMA =
+            RILConstants.NETWORK_MODE_NR_LTE_CDMA_EVDO_GSM_WCDMA;
+
+    /**
+     * Preferred network mode is NR 5G, LTE and WCDMA.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_WCDMA = RILConstants.NETWORK_MODE_NR_LTE_WCDMA;
+
+    /**
+     * Preferred network mode is NR 5G, LTE and TDSCDMA.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_TDSCDMA = RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA;
+
+    /**
+     * Preferred network mode is NR 5G, LTE, TD-SCDMA and GSM.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_TDSCDMA_GSM =
+            RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_GSM;
+
+    /**
+     * Preferred network mode is NR 5G, LTE, TD-SCDMA, WCDMA.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_TDSCDMA_WCDMA =
+            RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_WCDMA;
+
+    /**
+     * Preferred network mode is NR 5G, LTE, TD-SCDMA, GSM and WCDMA.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_TDSCDMA_GSM_WCDMA =
+            RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_GSM_WCDMA;
+
+    /**
+     * Preferred network mode is NR 5G, LTE, TD-SCDMA, CDMA, EVDO, GSM and WCDMA.
+     * @hide
+     */
+    public static final int NETWORK_MODE_NR_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA =
+            RILConstants.NETWORK_MODE_NR_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA;
+
+    /**
      * Get the preferred network type.
      * Used for device configuration by some CDMA operators.
      *
      * <p>Requires Permission:
-     * {@link android.Manifest.permission#MODIFY_PHONE_STATE MODIFY_PHONE_STATE} or that the calling
+     * {@link android.Manifest.permission#READ_PRIVILEGED_PHONE_STATE READ_PRIVILEGED_PHONE_STATE}
      * app has carrier privileges (see {@link #hasCarrierPrivileges}).
      *
      * @return the preferred network type.
      * @hide
      */
-    @RequiresPermission((android.Manifest.permission.MODIFY_PHONE_STATE))
-    @SystemApi
+    @RequiresPermission((android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE))
+    @UnsupportedAppUsage
     public @PrefNetworkMode int getPreferredNetworkType(int subId) {
         try {
             ITelephony telephony = getITelephony();
-            if (telephony != null)
+            if (telephony != null) {
                 return telephony.getPreferredNetworkType(subId);
+            }
         } catch (RemoteException ex) {
             Rlog.e(TAG, "getPreferredNetworkType RemoteException", ex);
         } catch (NullPointerException ex) {
@@ -7797,9 +7890,7 @@
      * support for the feature and device firmware support.
      *
      * @return {@code true} if the device and carrier both support RTT, {@code false} otherwise.
-     * @hide
      */
-    @TestApi
     public boolean isRttSupported() {
         try {
             ITelephony telephony = getITelephony();
@@ -9508,10 +9599,10 @@
      *
      * <p>
      * Requires Permission:
-     *   {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}
+     *   {@link android.Manifest.permission#READ_PRIVILEGED_PHONE_STATE READ_PRIVILEGED_PHONE_STATE}
      * @hide
      */
-    @RequiresPermission(android.Manifest.permission.READ_PHONE_STATE)
+    @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
     public boolean isOpportunisticNetworkEnabled() {
         String pkgForDebug = mContext != null ? mContext.getOpPackageName() : "<unknown>";
         boolean isEnabled = false;
@@ -9892,12 +9983,17 @@
      * Get preferred opportunistic data subscription Id
      *
      * <p>Requires that the calling app has carrier privileges (see {@link #hasCarrierPrivileges}),
-     * or has permission {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE}.
+     * or has either READ_PRIVILEGED_PHONE_STATE
+     * or {@link android.Manifest.permission#READ_PHONE_STATE READ_PHONE_STATE} permission.
      * @return subId preferred opportunistic subscription id or
      * {@link SubscriptionManager#DEFAULT_SUBSCRIPTION_ID} if there are no preferred
      * subscription id
      *
      */
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE,
+            android.Manifest.permission.READ_PHONE_STATE
+    })
     public int getPreferredOpportunisticDataSubscription() {
         String pkgForDebug = mContext != null ? mContext.getOpPackageName() : "<unknown>";
         int subId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
diff --git a/telephony/java/android/telephony/euicc/EuiccManager.java b/telephony/java/android/telephony/euicc/EuiccManager.java
index e462746..40c6f70 100644
--- a/telephony/java/android/telephony/euicc/EuiccManager.java
+++ b/telephony/java/android/telephony/euicc/EuiccManager.java
@@ -253,7 +253,7 @@
     public static final int EUICC_OTA_STATUS_UNAVAILABLE = 5;
 
     private final Context mContext;
-    private final int mCardId;
+    private int mCardId;
 
     /** @hide */
     public EuiccManager(Context context) {
@@ -291,7 +291,7 @@
     public boolean isEnabled() {
         // In the future, this may reach out to IEuiccController (if non-null) to check any dynamic
         // restrictions.
-        return getIEuiccController() != null && mCardId != TelephonyManager.INVALID_CARD_ID;
+        return getIEuiccController() != null;
     }
 
     /**
@@ -301,11 +301,11 @@
      * current eUICC. A calling app with carrier privileges for one eUICC may not necessarily have
      * access to the EID of another eUICC.
      *
-     * @return the EID. May be null if {@link #isEnabled()} is false or the eUICC is not ready.
+     * @return the EID. May be null if the eUICC is not ready.
      */
     @Nullable
     public String getEid() {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             return null;
         }
         try {
@@ -320,15 +320,15 @@
      *
      * <p>Requires the {@link android.Manifest.permission#WRITE_EMBEDDED_SUBSCRIPTIONS} permission.
      *
-     * @return the status of eUICC OTA. If {@link #isEnabled()} is false or the eUICC is not ready,
-     *     {@link OtaStatus#EUICC_OTA_STATUS_UNAVAILABLE} will be returned.
+     * @return the status of eUICC OTA. If the eUICC is not ready,
+     *         {@link OtaStatus#EUICC_OTA_STATUS_UNAVAILABLE} will be returned.
      *
      * @hide
      */
     @SystemApi
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public int getOtaStatus() {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             return EUICC_OTA_STATUS_UNAVAILABLE;
         }
         try {
@@ -363,7 +363,7 @@
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public void downloadSubscription(DownloadableSubscription subscription,
             boolean switchAfterDownload, PendingIntent callbackIntent) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             sendUnavailableError(callbackIntent);
             return;
         }
@@ -425,7 +425,7 @@
     @SystemApi
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public void continueOperation(Intent resolutionIntent, Bundle resolutionExtras) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             PendingIntent callbackIntent =
                     resolutionIntent.getParcelableExtra(
                             EuiccManager.EXTRA_EMBEDDED_SUBSCRIPTION_RESOLUTION_CALLBACK_INTENT);
@@ -462,7 +462,7 @@
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public void getDownloadableSubscriptionMetadata(
             DownloadableSubscription subscription, PendingIntent callbackIntent) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             sendUnavailableError(callbackIntent);
             return;
         }
@@ -492,7 +492,7 @@
     @SystemApi
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public void getDefaultDownloadableSubscriptionList(PendingIntent callbackIntent) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             sendUnavailableError(callbackIntent);
             return;
         }
@@ -507,12 +507,11 @@
     /**
      * Returns information about the eUICC chip/device.
      *
-     * @return the {@link EuiccInfo}. May be null if {@link #isEnabled()} is false or the eUICC is
-     *     not ready.
+     * @return the {@link EuiccInfo}. May be null if the eUICC is not ready.
      */
     @Nullable
     public EuiccInfo getEuiccInfo() {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             return null;
         }
         try {
@@ -537,7 +536,7 @@
      */
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public void deleteSubscription(int subscriptionId, PendingIntent callbackIntent) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             sendUnavailableError(callbackIntent);
             return;
         }
@@ -577,7 +576,7 @@
      */
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public void switchToSubscription(int subscriptionId, PendingIntent callbackIntent) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             sendUnavailableError(callbackIntent);
             return;
         }
@@ -603,7 +602,7 @@
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public void updateSubscriptionNickname(
             int subscriptionId, String nickname, PendingIntent callbackIntent) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             sendUnavailableError(callbackIntent);
             return;
         }
@@ -627,7 +626,7 @@
     @SystemApi
     @RequiresPermission(Manifest.permission.WRITE_EMBEDDED_SUBSCRIPTIONS)
     public void eraseSubscriptions(PendingIntent callbackIntent) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             sendUnavailableError(callbackIntent);
             return;
         }
@@ -657,7 +656,7 @@
      * @hide
      */
     public void retainSubscriptionsForFactoryReset(PendingIntent callbackIntent) {
-        if (!isEnabled()) {
+        if (!refreshCardIdIfInvalid()) {
             sendUnavailableError(callbackIntent);
             return;
         }
@@ -668,6 +667,19 @@
         }
     }
 
+    private boolean refreshCardIdIfInvalid() {
+        if (!isEnabled()) {
+            return false;
+        }
+        // Refresh mCardId if it's invalid.
+        if (mCardId == TelephonyManager.INVALID_CARD_ID) {
+            TelephonyManager tm = (TelephonyManager)
+                    mContext.getSystemService(Context.TELEPHONY_SERVICE);
+            mCardId = tm.getCardIdForDefaultEuicc();
+        }
+        return true;
+    }
+
     private static void sendUnavailableError(PendingIntent callbackIntent) {
         try {
             callbackIntent.send(EMBEDDED_SUBSCRIPTION_RESULT_ERROR);
diff --git a/telephony/java/android/telephony/ims/ImsReasonInfo.java b/telephony/java/android/telephony/ims/ImsReasonInfo.java
index 4d95e55..d8d2d9e 100644
--- a/telephony/java/android/telephony/ims/ImsReasonInfo.java
+++ b/telephony/java/android/telephony/ims/ImsReasonInfo.java
@@ -465,7 +465,7 @@
     public static final int CODE_USER_REJECTED_SESSION_MODIFICATION = 511;
 
     /**
-    * Upgrade Downgrade request cacncelled by the user who initiated it
+    * Upgrade Downgrade request cancelled by the user who initiated it
     */
     public static final int CODE_USER_CANCELLED_SESSION_MODIFICATION = 512;
 
@@ -887,6 +887,185 @@
     public static final int CODE_OEM_CAUSE_15 = 0xf00f;
 
     /**
+     * @hide
+     */
+    @IntDef(value = {
+            CODE_UNSPECIFIED,
+            CODE_LOCAL_ILLEGAL_ARGUMENT,
+            CODE_LOCAL_ILLEGAL_STATE,
+            CODE_LOCAL_INTERNAL_ERROR,
+            CODE_LOCAL_IMS_SERVICE_DOWN,
+            CODE_LOCAL_NO_PENDING_CALL,
+            CODE_LOCAL_ENDED_BY_CONFERENCE_MERGE,
+            CODE_LOCAL_POWER_OFF,
+            CODE_LOCAL_LOW_BATTERY,
+            CODE_LOCAL_NETWORK_NO_SERVICE,
+            CODE_LOCAL_NETWORK_NO_LTE_COVERAGE,
+            CODE_LOCAL_NETWORK_ROAMING,
+            CODE_LOCAL_NETWORK_IP_CHANGED,
+            CODE_LOCAL_SERVICE_UNAVAILABLE,
+            CODE_LOCAL_NOT_REGISTERED,
+            CODE_LOCAL_CALL_EXCEEDED,
+            CODE_LOCAL_CALL_BUSY,
+            CODE_LOCAL_CALL_DECLINE,
+            CODE_LOCAL_CALL_VCC_ON_PROGRESSING,
+            CODE_LOCAL_CALL_RESOURCE_RESERVATION_FAILED,
+            CODE_LOCAL_CALL_CS_RETRY_REQUIRED,
+            CODE_LOCAL_CALL_VOLTE_RETRY_REQUIRED,
+            CODE_LOCAL_CALL_TERMINATED,
+            CODE_LOCAL_HO_NOT_FEASIBLE,
+            CODE_TIMEOUT_1XX_WAITING,
+            CODE_TIMEOUT_NO_ANSWER,
+            CODE_TIMEOUT_NO_ANSWER_CALL_UPDATE,
+            CODE_CALL_BARRED,
+            CODE_FDN_BLOCKED,
+            CODE_IMEI_NOT_ACCEPTED,
+            CODE_DIAL_MODIFIED_TO_USSD,
+            CODE_DIAL_MODIFIED_TO_SS,
+            CODE_DIAL_MODIFIED_TO_DIAL,
+            CODE_DIAL_MODIFIED_TO_DIAL_VIDEO,
+            CODE_DIAL_VIDEO_MODIFIED_TO_DIAL,
+            CODE_DIAL_VIDEO_MODIFIED_TO_DIAL_VIDEO,
+            CODE_DIAL_VIDEO_MODIFIED_TO_SS,
+            CODE_DIAL_VIDEO_MODIFIED_TO_USSD,
+            CODE_SIP_REDIRECTED,
+            CODE_SIP_BAD_REQUEST,
+            CODE_SIP_FORBIDDEN,
+            CODE_SIP_NOT_FOUND,
+            CODE_SIP_NOT_SUPPORTED,
+            CODE_SIP_REQUEST_TIMEOUT,
+            CODE_SIP_TEMPRARILY_UNAVAILABLE,
+            CODE_SIP_BAD_ADDRESS,
+            CODE_SIP_BUSY,
+            CODE_SIP_REQUEST_CANCELLED,
+            CODE_SIP_NOT_ACCEPTABLE,
+            CODE_SIP_NOT_REACHABLE,
+            CODE_SIP_CLIENT_ERROR,
+            CODE_SIP_TRANSACTION_DOES_NOT_EXIST,
+            CODE_SIP_SERVER_INTERNAL_ERROR,
+            CODE_SIP_SERVICE_UNAVAILABLE,
+            CODE_SIP_SERVER_TIMEOUT,
+            CODE_SIP_SERVER_ERROR,
+            CODE_SIP_USER_REJECTED,
+            CODE_SIP_GLOBAL_ERROR,
+            CODE_EMERGENCY_TEMP_FAILURE,
+            CODE_EMERGENCY_PERM_FAILURE,
+            CODE_SIP_USER_MARKED_UNWANTED,
+            CODE_SIP_METHOD_NOT_ALLOWED,
+            CODE_SIP_PROXY_AUTHENTICATION_REQUIRED,
+            CODE_SIP_REQUEST_ENTITY_TOO_LARGE,
+            CODE_SIP_REQUEST_URI_TOO_LARGE,
+            CODE_SIP_EXTENSION_REQUIRED,
+            CODE_SIP_INTERVAL_TOO_BRIEF,
+            CODE_SIP_CALL_OR_TRANS_DOES_NOT_EXIST,
+            CODE_SIP_LOOP_DETECTED,
+            CODE_SIP_TOO_MANY_HOPS,
+            CODE_SIP_AMBIGUOUS,
+            CODE_SIP_REQUEST_PENDING,
+            CODE_SIP_UNDECIPHERABLE,
+            CODE_MEDIA_INIT_FAILED,
+            CODE_MEDIA_NO_DATA,
+            CODE_MEDIA_NOT_ACCEPTABLE,
+            CODE_MEDIA_UNSPECIFIED,
+            CODE_USER_TERMINATED,
+            CODE_USER_NOANSWER,
+            CODE_USER_IGNORE,
+            CODE_USER_DECLINE,
+            CODE_LOW_BATTERY,
+            CODE_BLACKLISTED_CALL_ID,
+            CODE_USER_TERMINATED_BY_REMOTE,
+            CODE_USER_REJECTED_SESSION_MODIFICATION,
+            CODE_USER_CANCELLED_SESSION_MODIFICATION,
+            CODE_SESSION_MODIFICATION_FAILED,
+            CODE_UT_NOT_SUPPORTED,
+            CODE_UT_SERVICE_UNAVAILABLE,
+            CODE_UT_OPERATION_NOT_ALLOWED,
+            CODE_UT_NETWORK_ERROR,
+            CODE_UT_CB_PASSWORD_MISMATCH,
+            CODE_UT_SS_MODIFIED_TO_DIAL,
+            CODE_UT_SS_MODIFIED_TO_USSD,
+            CODE_UT_SS_MODIFIED_TO_SS,
+            CODE_UT_SS_MODIFIED_TO_DIAL_VIDEO,
+            CODE_ECBM_NOT_SUPPORTED,
+            CODE_MULTIENDPOINT_NOT_SUPPORTED,
+            CODE_REGISTRATION_ERROR,
+            CODE_ANSWERED_ELSEWHERE,
+            CODE_CALL_PULL_OUT_OF_SYNC,
+            CODE_CALL_END_CAUSE_CALL_PULL,
+            CODE_CALL_DROP_IWLAN_TO_LTE_UNAVAILABLE,
+            CODE_REJECTED_ELSEWHERE,
+            CODE_SUPP_SVC_FAILED,
+            CODE_SUPP_SVC_CANCELLED,
+            CODE_SUPP_SVC_REINVITE_COLLISION,
+            CODE_IWLAN_DPD_FAILURE,
+            CODE_EPDG_TUNNEL_ESTABLISH_FAILURE,
+            CODE_EPDG_TUNNEL_REKEY_FAILURE,
+            CODE_EPDG_TUNNEL_LOST_CONNECTION,
+            CODE_MAXIMUM_NUMBER_OF_CALLS_REACHED,
+            CODE_REMOTE_CALL_DECLINE,
+            CODE_DATA_LIMIT_REACHED,
+            CODE_DATA_DISABLED,
+            CODE_WIFI_LOST,
+            CODE_IKEV2_AUTH_FAILURE,
+            CODE_RADIO_OFF,
+            CODE_NO_VALID_SIM,
+            CODE_RADIO_INTERNAL_ERROR,
+            CODE_NETWORK_RESP_TIMEOUT,
+            CODE_NETWORK_REJECT,
+            CODE_RADIO_ACCESS_FAILURE,
+            CODE_RADIO_LINK_FAILURE,
+            CODE_RADIO_LINK_LOST,
+            CODE_RADIO_UPLINK_FAILURE,
+            CODE_RADIO_SETUP_FAILURE,
+            CODE_RADIO_RELEASE_NORMAL,
+            CODE_RADIO_RELEASE_ABNORMAL,
+            CODE_ACCESS_CLASS_BLOCKED,
+            CODE_NETWORK_DETACH,
+            CODE_SIP_ALTERNATE_EMERGENCY_CALL,
+            CODE_UNOBTAINABLE_NUMBER,
+            CODE_NO_CSFB_IN_CS_ROAM,
+            CODE_REJECT_UNKNOWN,
+            CODE_REJECT_ONGOING_CALL_WAITING_DISABLED,
+            CODE_REJECT_CALL_ON_OTHER_SUB,
+            CODE_REJECT_1X_COLLISION,
+            CODE_REJECT_SERVICE_NOT_REGISTERED,
+            CODE_REJECT_CALL_TYPE_NOT_ALLOWED,
+            CODE_REJECT_ONGOING_E911_CALL,
+            CODE_REJECT_ONGOING_CALL_SETUP,
+            CODE_REJECT_MAX_CALL_LIMIT_REACHED,
+            CODE_REJECT_UNSUPPORTED_SIP_HEADERS,
+            CODE_REJECT_UNSUPPORTED_SDP_HEADERS,
+            CODE_REJECT_ONGOING_CALL_TRANSFER,
+            CODE_REJECT_INTERNAL_ERROR,
+            CODE_REJECT_QOS_FAILURE,
+            CODE_REJECT_ONGOING_HANDOVER,
+            CODE_REJECT_VT_TTY_NOT_ALLOWED,
+            CODE_REJECT_ONGOING_CALL_UPGRADE,
+            CODE_REJECT_CONFERENCE_TTY_NOT_ALLOWED,
+            CODE_REJECT_ONGOING_CONFERENCE_CALL,
+            CODE_REJECT_VT_AVPF_NOT_ALLOWED,
+            CODE_REJECT_ONGOING_ENCRYPTED_CALL,
+            CODE_REJECT_ONGOING_CS_CALL,
+            CODE_OEM_CAUSE_1,
+            CODE_OEM_CAUSE_2,
+            CODE_OEM_CAUSE_3,
+            CODE_OEM_CAUSE_4,
+            CODE_OEM_CAUSE_5,
+            CODE_OEM_CAUSE_6,
+            CODE_OEM_CAUSE_7,
+            CODE_OEM_CAUSE_8,
+            CODE_OEM_CAUSE_9,
+            CODE_OEM_CAUSE_10,
+            CODE_OEM_CAUSE_11,
+            CODE_OEM_CAUSE_12,
+            CODE_OEM_CAUSE_13,
+            CODE_OEM_CAUSE_14,
+            CODE_OEM_CAUSE_15
+    }, prefix = "CODE_")
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface ImsCode {}
+
+    /**
      * Network string error messages.
      * mExtraMessage may have these values.
      */
@@ -964,7 +1143,7 @@
     /**
      * @return an integer representing more information about the completion of an operation.
      */
-    public int getCode() {
+    public @ImsCode int getCode() {
         return mCode;
     }
 
diff --git a/telephony/java/android/telephony/ims/Rcs1To1Thread.java b/telephony/java/android/telephony/ims/Rcs1To1Thread.java
index 709b3aa..cc28ee0 100644
--- a/telephony/java/android/telephony/ims/Rcs1To1Thread.java
+++ b/telephony/java/android/telephony/ims/Rcs1To1Thread.java
@@ -15,42 +15,72 @@
  */
 package android.telephony.ims;
 
-import android.os.Parcel;
+import android.annotation.NonNull;
+import android.annotation.WorkerThread;
 
 /**
  * Rcs1To1Thread represents a single RCS conversation thread with a total of two
- * {@link RcsParticipant}s.
- * @hide - TODO(sahinc) make this public
+ * {@link RcsParticipant}s. Please see Section 5 (1-to-1 Messaging) - GSMA RCC.71 (RCS Universal
+ * Profile Service Definition Document)
+ *
+ * @hide - TODO(109759350) make this public
  */
 public class Rcs1To1Thread extends RcsThread {
+    private int mThreadId;
+
+    /**
+     * Public constructor only for RcsMessageStoreController to initialize new threads.
+     *
+     * @hide
+     */
     public Rcs1To1Thread(int threadId) {
         super(threadId);
+        mThreadId = threadId;
     }
 
-    public static final Creator<Rcs1To1Thread> CREATOR = new Creator<Rcs1To1Thread>() {
-        @Override
-        public Rcs1To1Thread createFromParcel(Parcel in) {
-            return new Rcs1To1Thread(in);
-        }
-
-        @Override
-        public Rcs1To1Thread[] newArray(int size) {
-            return new Rcs1To1Thread[size];
-        }
-    };
-
-    protected Rcs1To1Thread(Parcel in) {
-        super(in);
-    }
-
+    /**
+     * @return Returns {@code false} as this is always a 1 to 1 thread.
+     */
     @Override
-    public int describeContents() {
-        return 0;
+    public boolean isGroup() {
+        return false;
     }
 
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeInt(RCS_1_TO_1_TYPE);
-        super.writeToParcel(dest, flags);
+    /**
+     * {@link Rcs1To1Thread}s can fall back to SMS as a back-up protocol. This function returns the
+     * thread id to be used to query {@code content://mms-sms/conversation/#} to get the fallback
+     * thread.
+     *
+     * @return The thread id to be used to query the mms-sms authority
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getFallbackThreadId() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.get1To1ThreadFallbackThreadId(mThreadId));
+    }
+
+    /**
+     * If the RCS client allows falling back to SMS, it needs to create an MMS-SMS thread in the
+     * SMS/MMS Provider( see {@link android.provider.Telephony.MmsSms#CONTENT_CONVERSATIONS_URI}.
+     * Use this function to link the {@link Rcs1To1Thread} to the MMS-SMS thread. This function
+     * also updates the storage.
+     *
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setFallbackThreadId(long fallbackThreadId) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.set1To1ThreadFallbackThreadId(mThreadId, fallbackThreadId));
+    }
+
+    /**
+     * @return Returns the {@link RcsParticipant} that receives the messages sent in this thread.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @NonNull
+    @WorkerThread
+    public RcsParticipant getRecipient() throws RcsMessageStoreException {
+        return new RcsParticipant(
+                RcsControllerCall.call(iRcs -> iRcs.get1To1ThreadOtherParticipantId(mThreadId)));
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsControllerCall.java b/telephony/java/android/telephony/ims/RcsControllerCall.java
new file mode 100644
index 0000000..5512c4c
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsControllerCall.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import android.content.Context;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.telephony.ims.aidl.IRcs;
+
+/**
+ * A wrapper class around RPC calls that {@link RcsMessageStore} APIs to minimize boilerplate code.
+ *
+ * @hide - not meant for public use
+ */
+class RcsControllerCall {
+    static <R> R call(RcsServiceCall<R> serviceCall) throws RcsMessageStoreException {
+        IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService(Context.TELEPHONY_RCS_SERVICE));
+        if (iRcs == null) {
+            throw new RcsMessageStoreException("Could not connect to RCS storage service");
+        }
+
+        try {
+            return serviceCall.methodOnIRcs(iRcs);
+        } catch (RemoteException exception) {
+            throw new RcsMessageStoreException(exception.getMessage());
+        }
+    }
+
+    static void callWithNoReturn(RcsServiceCallWithNoReturn serviceCall)
+            throws RcsMessageStoreException {
+        IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService(Context.TELEPHONY_RCS_SERVICE));
+        if (iRcs == null) {
+            throw new RcsMessageStoreException("Could not connect to RCS storage service");
+        }
+
+        try {
+            serviceCall.methodOnIRcs(iRcs);
+        } catch (RemoteException exception) {
+            throw new RcsMessageStoreException(exception.getMessage());
+        }
+    }
+
+    interface RcsServiceCall<R> {
+        R methodOnIRcs(IRcs iRcs) throws RemoteException;
+    }
+
+    interface RcsServiceCallWithNoReturn {
+        void methodOnIRcs(IRcs iRcs) throws RemoteException;
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsPart.aidl b/telephony/java/android/telephony/ims/RcsEvent.aidl
similarity index 96%
rename from telephony/java/android/telephony/ims/RcsPart.aidl
rename to telephony/java/android/telephony/ims/RcsEvent.aidl
index 8b8077d..08974e0 100644
--- a/telephony/java/android/telephony/ims/RcsPart.aidl
+++ b/telephony/java/android/telephony/ims/RcsEvent.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsPart;
+parcelable RcsEvent;
diff --git a/telephony/java/android/telephony/ims/RcsEvent.java b/telephony/java/android/telephony/ims/RcsEvent.java
new file mode 100644
index 0000000..744ac76
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsEvent.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.telephony.ims;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * The base class for events that can happen on {@link RcsParticipant}s and {@link RcsThread}s.
+ * @hide - TODO(109759350) make this public
+ */
+public abstract class RcsEvent implements Parcelable {
+    protected long mTimestamp;
+
+    protected RcsEvent(long timestamp) {
+        mTimestamp = timestamp;
+    }
+
+    /**
+     * @return Returns the time of when this event happened. The timestamp is defined as
+     * milliseconds passed after midnight, January 1, 1970 UTC
+     */
+    public long getTimestamp() {
+        return mTimestamp;
+    }
+
+    /**
+     * Persists the event to the data store
+     *
+     * @hide
+     */
+    abstract void persist() throws RcsMessageStoreException;
+
+    RcsEvent(Parcel in) {
+        mTimestamp = in.readLong();
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeLong(mTimestamp);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsEventQueryParameters.aidl
similarity index 94%
rename from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
rename to telephony/java/android/telephony/ims/RcsEventQueryParameters.aidl
index 82d985d..9a3600b 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsEventQueryParameters.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsEventQueryParameters;
diff --git a/telephony/java/android/telephony/ims/RcsEventQueryParameters.java b/telephony/java/android/telephony/ims/RcsEventQueryParameters.java
new file mode 100644
index 0000000..6aee56f
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsEventQueryParameters.java
@@ -0,0 +1,322 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import static android.provider.Telephony.RcsColumns.RcsEventTypes.ICON_CHANGED_EVENT_TYPE;
+import static android.provider.Telephony.RcsColumns.RcsEventTypes.NAME_CHANGED_EVENT_TYPE;
+import static android.provider.Telephony.RcsColumns.RcsEventTypes.PARTICIPANT_ALIAS_CHANGED_EVENT_TYPE;
+import static android.provider.Telephony.RcsColumns.RcsEventTypes.PARTICIPANT_JOINED_EVENT_TYPE;
+import static android.provider.Telephony.RcsColumns.RcsEventTypes.PARTICIPANT_LEFT_EVENT_TYPE;
+
+import android.annotation.CheckResult;
+import android.annotation.IntDef;
+import android.annotation.IntRange;
+import android.annotation.NonNull;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.security.InvalidParameterException;
+
+/**
+ * The parameters to pass into
+ * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)} in order to select a
+ * subset of {@link RcsEvent}s present in the message store.
+ *
+ * @hide TODO - make the Builder and builder() public. The rest should stay internal only.
+ */
+public class RcsEventQueryParameters implements Parcelable {
+    /**
+     * Flag to be used with {@link Builder#setEventType(int)} to make
+     * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)} return all types of
+     * {@link RcsEvent}s
+     */
+    public static final int ALL_EVENTS = -1;
+
+    /**
+     * Flag to be used with {@link Builder#setEventType(int)} to make
+     * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)} return sub-types of
+     * {@link RcsGroupThreadEvent}s
+     */
+    public static final int ALL_GROUP_THREAD_EVENTS = 0;
+
+    /**
+     * Flag to be used with {@link Builder#setEventType(int)} to make
+     * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)} return only
+     * {@link RcsParticipantAliasChangedEvent}s
+     */
+    public static final int PARTICIPANT_ALIAS_CHANGED_EVENT =
+            PARTICIPANT_ALIAS_CHANGED_EVENT_TYPE;
+
+    /**
+     * Flag to be used with {@link Builder#setEventType(int)} to make
+     * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)} return only
+     * {@link RcsGroupThreadParticipantJoinedEvent}s
+     */
+    public static final int GROUP_THREAD_PARTICIPANT_JOINED_EVENT =
+            PARTICIPANT_JOINED_EVENT_TYPE;
+
+    /**
+     * Flag to be used with {@link Builder#setEventType(int)} to make
+     * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)} return only
+     * {@link RcsGroupThreadParticipantLeftEvent}s
+     */
+    public static final int GROUP_THREAD_PARTICIPANT_LEFT_EVENT =
+            PARTICIPANT_LEFT_EVENT_TYPE;
+
+    /**
+     * Flag to be used with {@link Builder#setEventType(int)} to make
+     * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)} return only
+     * {@link RcsGroupThreadNameChangedEvent}s
+     */
+    public static final int GROUP_THREAD_NAME_CHANGED_EVENT = NAME_CHANGED_EVENT_TYPE;
+
+    /**
+     * Flag to be used with {@link Builder#setEventType(int)} to make
+     * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)} return only
+     * {@link RcsGroupThreadIconChangedEvent}s
+     */
+    public static final int GROUP_THREAD_ICON_CHANGED_EVENT = ICON_CHANGED_EVENT_TYPE;
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({ALL_EVENTS, ALL_GROUP_THREAD_EVENTS, PARTICIPANT_ALIAS_CHANGED_EVENT,
+            GROUP_THREAD_PARTICIPANT_JOINED_EVENT, GROUP_THREAD_PARTICIPANT_LEFT_EVENT,
+            GROUP_THREAD_NAME_CHANGED_EVENT, GROUP_THREAD_ICON_CHANGED_EVENT})
+    public @interface EventType {
+    }
+
+    /**
+     * Flag to be used with {@link Builder#setSortProperty(int)} that makes the result set sorted
+     * in the order of creation for faster query results.
+     */
+    public static final int SORT_BY_CREATION_ORDER = 0;
+
+    /**
+     * Flag to be used with {@link Builder#setSortProperty(int)} that makes the result set sorted
+     * with respect to {@link RcsEvent#getTimestamp()}
+     */
+    public static final int SORT_BY_TIMESTAMP = 1;
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({SORT_BY_CREATION_ORDER, SORT_BY_TIMESTAMP})
+    public @interface SortingProperty {
+    }
+
+    /**
+     * The key to pass into a Bundle, for usage in RcsProvider.query(Bundle)
+     * @hide - not meant for public use
+     */
+    public static final String EVENT_QUERY_PARAMETERS_KEY = "event_query_parameters";
+
+    // Which types of events the results should be limited to
+    private @EventType int mEventType;
+    // The property which the results should be sorted against
+    private int mSortingProperty;
+    // Whether the results should be sorted in ascending order
+    private boolean mIsAscending;
+    // The number of results that should be returned with this query
+    private int mLimit;
+    // The thread that the results are limited to
+    private int mThreadId;
+
+    RcsEventQueryParameters(@EventType int eventType, int threadId,
+            @SortingProperty int sortingProperty, boolean isAscending, int limit) {
+        mEventType = eventType;
+        mSortingProperty = sortingProperty;
+        mIsAscending = isAscending;
+        mLimit = limit;
+        mThreadId = threadId;
+    }
+
+    /**
+     * @return Returns the type of {@link RcsEvent}s that this {@link RcsEventQueryParameters} is
+     * set to query for.
+     */
+    public @EventType int getEventType() {
+        return mEventType;
+    }
+
+    /**
+     * @return Returns the type of {@link RcsEvent}s that this {@link RcsEventQueryParameters} is
+     * set to query for.
+     */
+    public int getLimit() {
+        return mLimit;
+    }
+
+    /**
+     * @return Returns the property where the results should be sorted against.
+     * @see SortingProperty
+     */
+    public int getSortingProperty() {
+        return mSortingProperty;
+    }
+
+    /**
+     * @return Returns {@code true} if the result set will be sorted in ascending order,
+     * {@code false} if it will be sorted in descending order.
+     */
+    public boolean getSortDirection() {
+        return mIsAscending;
+    }
+
+    /**
+     * @return Returns the ID of the {@link RcsGroupThread} that the results are limited to. As this
+     * API exposes an ID, it should stay hidden.
+     *
+     * @hide
+     */
+    public int getThreadId() {
+        return mThreadId;
+    }
+
+    /**
+     * A helper class to build the {@link RcsEventQueryParameters}.
+     */
+    public static class Builder {
+        private @EventType int mEventType;
+        private @SortingProperty int mSortingProperty;
+        private boolean mIsAscending;
+        private int mLimit = 100;
+        private int mThreadId;
+
+        /**
+         * Creates a new builder for {@link RcsEventQueryParameters} to be used in
+         * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)}
+         */
+        public Builder() {
+            // empty implementation
+        }
+
+        /**
+         * Desired number of events to be returned from the query. Passing in 0 will return all
+         * existing events at once. The limit defaults to 100.
+         *
+         * @param limit The number to limit the query result to.
+         * @return The same instance of the builder to chain parameters.
+         * @throws InvalidParameterException If the given limit is negative.
+         */
+        @CheckResult
+        public Builder setResultLimit(@IntRange(from = 0) int limit)
+                throws InvalidParameterException {
+            if (limit < 0) {
+                throw new InvalidParameterException("The query limit must be non-negative");
+            }
+
+            mLimit = limit;
+            return this;
+        }
+
+        /**
+         * Sets the type of events to be returned from the query.
+         *
+         * @param eventType The type of event to be returned.
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setEventType(@EventType int eventType) {
+            mEventType = eventType;
+            return this;
+        }
+
+        /**
+         * Sets the property where the results should be sorted against. Defaults to
+         * {@link RcsEventQueryParameters.SortingProperty#SORT_BY_CREATION_ORDER}
+         *
+         * @param sortingProperty against which property the results should be sorted
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setSortProperty(@SortingProperty int sortingProperty) {
+            mSortingProperty = sortingProperty;
+            return this;
+        }
+
+        /**
+         * Sets whether the results should be sorted ascending or descending
+         *
+         * @param isAscending whether the results should be sorted ascending
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setSortDirection(boolean isAscending) {
+            mIsAscending = isAscending;
+            return this;
+        }
+
+        /**
+         * Limits the results to the given {@link RcsGroupThread}. Setting this value prevents
+         * returning any instances of {@link RcsParticipantAliasChangedEvent}.
+         *
+         * @param groupThread The thread to limit the results to.
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setGroupThread(@NonNull RcsGroupThread groupThread) {
+            mThreadId = groupThread.getThreadId();
+            return this;
+        }
+
+        /**
+         * Builds the {@link RcsEventQueryParameters} to use in
+         * {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)}
+         *
+         * @return An instance of {@link RcsEventQueryParameters} to use with the event query.
+         */
+        public RcsEventQueryParameters build() {
+            return new RcsEventQueryParameters(mEventType, mThreadId, mSortingProperty,
+                    mIsAscending, mLimit);
+        }
+    }
+
+    protected RcsEventQueryParameters(Parcel in) {
+        mEventType = in.readInt();
+        mThreadId = in.readInt();
+        mSortingProperty = in.readInt();
+        mIsAscending = in.readBoolean();
+        mLimit = in.readInt();
+    }
+
+    public static final Creator<RcsEventQueryParameters> CREATOR =
+            new Creator<RcsEventQueryParameters>() {
+                @Override
+                public RcsEventQueryParameters createFromParcel(Parcel in) {
+                    return new RcsEventQueryParameters(in);
+                }
+
+                @Override
+                public RcsEventQueryParameters[] newArray(int size) {
+                    return new RcsEventQueryParameters[size];
+                }
+            };
+
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(mEventType);
+        dest.writeInt(mThreadId);
+        dest.writeInt(mSortingProperty);
+        dest.writeBoolean(mIsAscending);
+        dest.writeInt(mLimit);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsEventQueryResult.aidl
similarity index 94%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsEventQueryResult.aidl
index 82d985d..7d13335 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsEventQueryResult.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsEventQueryResult;
diff --git a/telephony/java/android/telephony/ims/RcsEventQueryResult.java b/telephony/java/android/telephony/ims/RcsEventQueryResult.java
new file mode 100644
index 0000000..27898ab
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsEventQueryResult.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.List;
+
+/**
+ * The result of a {@link RcsMessageStore#getRcsEvents(RcsEventQueryParameters)}
+ * call. This class allows getting the token for querying the next batch of events in order to
+ * prevent handling large amounts of data at once.
+ *
+ * @hide
+ */
+public class RcsEventQueryResult implements Parcelable {
+    private RcsQueryContinuationToken mContinuationToken;
+    private List<RcsEvent> mEvents;
+
+    /**
+     * Internal constructor for {@link com.android.internal.telephony.ims.RcsMessageStoreController}
+     * to create query results
+     *
+     * @hide
+     */
+    public RcsEventQueryResult(
+            RcsQueryContinuationToken continuationToken,
+            List<RcsEvent> events) {
+        mContinuationToken = continuationToken;
+        mEvents = events;
+    }
+
+    /**
+     * Returns a token to call
+     * {@link RcsMessageStore#getRcsEvents(RcsQueryContinuationToken)}
+     * to get the next batch of {@link RcsEvent}s.
+     */
+    public RcsQueryContinuationToken getContinuationToken() {
+        return mContinuationToken;
+    }
+
+    /**
+     * Returns all the {@link RcsEvent}s in the current query result. Call {@link
+     * RcsMessageStore#getRcsEvents(RcsQueryContinuationToken)} to get the next batch
+     * of {@link RcsEvent}s.
+     */
+    public List<RcsEvent> getEvents() {
+        return mEvents;
+    }
+
+    protected RcsEventQueryResult(Parcel in) {
+    }
+
+    public static final Creator<RcsEventQueryResult> CREATOR = new Creator<RcsEventQueryResult>() {
+        @Override
+        public RcsEventQueryResult createFromParcel(Parcel in) {
+            return new RcsEventQueryResult(in);
+        }
+
+        @Override
+        public RcsEventQueryResult[] newArray(int size) {
+            return new RcsEventQueryResult[size];
+        }
+    };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeParcelable(mContinuationToken, flags);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsFileTransferCreationParameters.aidl
similarity index 93%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsFileTransferCreationParameters.aidl
index 82d985d..5fec021 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsFileTransferCreationParameters.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsFileTransferCreationParameters;
diff --git a/telephony/java/android/telephony/ims/RcsFileTransferCreationParameters.java b/telephony/java/android/telephony/ims/RcsFileTransferCreationParameters.java
new file mode 100644
index 0000000..bd7cb4b
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsFileTransferCreationParameters.java
@@ -0,0 +1,360 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.telephony.ims;
+
+import android.annotation.CheckResult;
+import android.net.Uri;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * Pass an instance of this class to
+ * {@link RcsMessage#insertFileTransfer(RcsFileTransferCreationParameters)} create an
+ * {@link RcsFileTransferPart} and save it into storage.
+ *
+ * @hide - TODO(109759350) make this public
+ */
+public class RcsFileTransferCreationParameters implements Parcelable {
+    private String mRcsFileTransferSessionId;
+    private Uri mContentUri;
+    private String mContentMimeType;
+    private long mFileSize;
+    private long mTransferOffset;
+    private int mWidth;
+    private int mHeight;
+    private long mMediaDuration;
+    private Uri mPreviewUri;
+    private String mPreviewMimeType;
+    private @RcsFileTransferPart.RcsFileTransferStatus int mFileTransferStatus;
+
+    /**
+     * @return Returns the globally unique RCS file transfer session ID for the
+     * {@link RcsFileTransferPart} to be created
+     */
+    public String getRcsFileTransferSessionId() {
+        return mRcsFileTransferSessionId;
+    }
+
+    /**
+     * @return Returns the URI for the content of the {@link RcsFileTransferPart} to be created
+     */
+    public Uri getContentUri() {
+        return mContentUri;
+    }
+
+    /**
+     * @return Returns the MIME type for the content of the {@link RcsFileTransferPart} to be
+     * created
+     */
+    public String getContentMimeType() {
+        return mContentMimeType;
+    }
+
+    /**
+     * @return Returns the file size in bytes for the {@link RcsFileTransferPart} to be created
+     */
+    public long getFileSize() {
+        return mFileSize;
+    }
+
+    /**
+     * @return Returns the transfer offset for the {@link RcsFileTransferPart} to be created. The
+     * file transfer offset is defined as how many bytes have been successfully transferred to the
+     * receiver of this file transfer.
+     */
+    public long getTransferOffset() {
+        return mTransferOffset;
+    }
+
+    /**
+     * @return Returns the width of the {@link RcsFileTransferPart} to be created. The value is in
+     * pixels.
+     */
+    public int getWidth() {
+        return mWidth;
+    }
+
+    /**
+     * @return Returns the height of the {@link RcsFileTransferPart} to be created. The value is in
+     * pixels.
+     */
+    public int getHeight() {
+        return mHeight;
+    }
+
+    /**
+     * @return Returns the duration of the {@link RcsFileTransferPart} to be created.
+     */
+    public long getMediaDuration() {
+        return mMediaDuration;
+    }
+
+    /**
+     * @return Returns the URI of the preview of the content of the {@link RcsFileTransferPart} to
+     * be created. This should only be used for multi-media files.
+     */
+    public Uri getPreviewUri() {
+        return mPreviewUri;
+    }
+
+    /**
+     * @return Returns the MIME type of the preview of the content of the
+     * {@link RcsFileTransferPart} to be created. This should only be used for multi-media files.
+     */
+    public String getPreviewMimeType() {
+        return mPreviewMimeType;
+    }
+
+    /**
+     * @return Returns the status of the {@link RcsFileTransferPart} to be created.
+     */
+    public @RcsFileTransferPart.RcsFileTransferStatus int getFileTransferStatus() {
+        return mFileTransferStatus;
+    }
+
+    /**
+     * @hide
+     */
+    RcsFileTransferCreationParameters(Builder builder) {
+        mRcsFileTransferSessionId = builder.mRcsFileTransferSessionId;
+        mContentUri = builder.mContentUri;
+        mContentMimeType = builder.mContentMimeType;
+        mFileSize = builder.mFileSize;
+        mTransferOffset = builder.mTransferOffset;
+        mWidth = builder.mWidth;
+        mHeight = builder.mHeight;
+        mMediaDuration = builder.mLength;
+        mPreviewUri = builder.mPreviewUri;
+        mPreviewMimeType = builder.mPreviewMimeType;
+        mFileTransferStatus = builder.mFileTransferStatus;
+    }
+
+    /**
+     * A builder to create instances of {@link RcsFileTransferCreationParameters}
+     */
+    public class Builder {
+        private String mRcsFileTransferSessionId;
+        private Uri mContentUri;
+        private String mContentMimeType;
+        private long mFileSize;
+        private long mTransferOffset;
+        private int mWidth;
+        private int mHeight;
+        private long mLength;
+        private Uri mPreviewUri;
+        private String mPreviewMimeType;
+        private @RcsFileTransferPart.RcsFileTransferStatus int mFileTransferStatus;
+
+        /**
+         * Sets the globally unique RCS file transfer session ID for the {@link RcsFileTransferPart}
+         * to be created
+         *
+         * @param sessionId The RCS file transfer session ID
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setFileTransferSessionId(String sessionId) {
+            mRcsFileTransferSessionId = sessionId;
+            return this;
+        }
+
+        /**
+         * Sets the URI for the content of the {@link RcsFileTransferPart} to be created
+         *
+         * @param contentUri The URI for the file
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setContentUri(Uri contentUri) {
+            mContentUri = contentUri;
+            return this;
+        }
+
+        /**
+         * Sets the MIME type for the content of the {@link RcsFileTransferPart} to be created
+         *
+         * @param contentType The MIME type of the file
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setContentMimeType(String contentType) {
+            mContentMimeType = contentType;
+            return this;
+        }
+
+        /**
+         * Sets the file size for the {@link RcsFileTransferPart} to be created
+         *
+         * @param size The size of the file in bytes
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setFileSize(long size) {
+            mFileSize = size;
+            return this;
+        }
+
+        /**
+         * Sets the transfer offset for the {@link RcsFileTransferPart} to be created. The file
+         * transfer offset is defined as how many bytes have been successfully transferred to the
+         * receiver of this file transfer.
+         *
+         * @param offset The transfer offset in bytes
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setTransferOffset(long offset) {
+            mTransferOffset = offset;
+            return this;
+        }
+
+        /**
+         * Sets the width of the {@link RcsFileTransferPart} to be created. This should only be used
+         * for multi-media files.
+         *
+         * @param width The width of the multi-media file in pixels.
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setWidth(int width) {
+            mWidth = width;
+            return this;
+        }
+
+        /**
+         * Sets the height of the {@link RcsFileTransferPart} to be created. This should only be
+         * used for multi-media files.
+         *
+         * @param height The height of the multi-media file in pixels.
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setHeight(int height) {
+            mHeight = height;
+            return this;
+        }
+
+        /**
+         * Sets the length of the {@link RcsFileTransferPart} to be created. This should only be
+         * used for multi-media files such as audio or video.
+         *
+         * @param length The length of the multi-media file in milliseconds
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setMediaDuration(long length) {
+            mLength = length;
+            return this;
+        }
+
+        /**
+         * Sets the URI of the preview of the content of the {@link RcsFileTransferPart} to be
+         * created. This should only be used for multi-media files.
+         *
+         * @param previewUri The URI of the preview of the file transfer
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setPreviewUri(Uri previewUri) {
+            mPreviewUri = previewUri;
+            return this;
+        }
+
+        /**
+         * Sets the MIME type of the preview of the content of the {@link RcsFileTransferPart} to
+         * be created. This should only be used for multi-media files.
+         *
+         * @param previewType The MIME type of the preview of the file transfer
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setPreviewMimeType(String previewType) {
+            mPreviewMimeType = previewType;
+            return this;
+        }
+
+        /**
+         * Sets the status of the {@link RcsFileTransferPart} to be created.
+         *
+         * @param status The status of the file transfer
+         * @return The same instance of {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setFileTransferStatus(
+                @RcsFileTransferPart.RcsFileTransferStatus int status) {
+            mFileTransferStatus = status;
+            return this;
+        }
+
+        /**
+         * Creates an instance of {@link RcsFileTransferCreationParameters} with the given
+         * parameters.
+         *
+         * @return The same instance of {@link Builder} to chain methods
+         * @see RcsMessage#insertFileTransfer(RcsFileTransferCreationParameters)
+         */
+        public RcsFileTransferCreationParameters build() {
+            return new RcsFileTransferCreationParameters(this);
+        }
+    }
+
+    protected RcsFileTransferCreationParameters(Parcel in) {
+        mRcsFileTransferSessionId = in.readString();
+        mContentUri = in.readParcelable(Uri.class.getClassLoader());
+        mContentMimeType = in.readString();
+        mFileSize = in.readLong();
+        mTransferOffset = in.readLong();
+        mWidth = in.readInt();
+        mHeight = in.readInt();
+        mMediaDuration = in.readLong();
+        mPreviewUri = in.readParcelable(Uri.class.getClassLoader());
+        mPreviewMimeType = in.readString();
+        mFileTransferStatus = in.readInt();
+    }
+
+    public static final Creator<RcsFileTransferCreationParameters> CREATOR =
+            new Creator<RcsFileTransferCreationParameters>() {
+                @Override
+                public RcsFileTransferCreationParameters createFromParcel(Parcel in) {
+                    return new RcsFileTransferCreationParameters(in);
+                }
+
+                @Override
+                public RcsFileTransferCreationParameters[] newArray(int size) {
+                    return new RcsFileTransferCreationParameters[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(mRcsFileTransferSessionId);
+        dest.writeParcelable(mContentUri, flags);
+        dest.writeString(mContentMimeType);
+        dest.writeLong(mFileSize);
+        dest.writeLong(mTransferOffset);
+        dest.writeInt(mWidth);
+        dest.writeInt(mHeight);
+        dest.writeLong(mMediaDuration);
+        dest.writeParcelable(mPreviewUri, flags);
+        dest.writeString(mPreviewMimeType);
+        dest.writeInt(mFileTransferStatus);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsFileTransferPart.aidl b/telephony/java/android/telephony/ims/RcsFileTransferPart.aidl
deleted file mode 100644
index eaf3128..0000000
--- a/telephony/java/android/telephony/ims/RcsFileTransferPart.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsFileTransferPart;
diff --git a/telephony/java/android/telephony/ims/RcsFileTransferPart.java b/telephony/java/android/telephony/ims/RcsFileTransferPart.java
index 39c58dd..2eadc4a 100644
--- a/telephony/java/android/telephony/ims/RcsFileTransferPart.java
+++ b/telephony/java/android/telephony/ims/RcsFileTransferPart.java
@@ -15,34 +15,346 @@
  */
 package android.telephony.ims;
 
-import android.os.Parcel;
+import android.annotation.IntDef;
+import android.annotation.Nullable;
+import android.annotation.WorkerThread;
+import android.net.Uri;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
 
 /**
- * A part of a composite {@link RcsMessage} that holds a file transfer.
- * @hide - TODO(sahinc) make this public
+ * A part of a composite {@link RcsMessage} that holds a file transfer. Please see Section 7
+ * (File Transfer) - GSMA RCC.71 (RCS Universal Profile Service Definition Document)
+ *
+ * @hide - TODO(109759350) make this public
  */
-public class RcsFileTransferPart extends RcsPart {
-    public static final Creator<RcsFileTransferPart> CREATOR = new Creator<RcsFileTransferPart>() {
-        @Override
-        public RcsFileTransferPart createFromParcel(Parcel in) {
-            return new RcsFileTransferPart(in);
-        }
+public class RcsFileTransferPart {
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} is not set yet.
+     */
+    public static final int NOT_SET = 0;
 
-        @Override
-        public RcsFileTransferPart[] newArray(int size) {
-            return new RcsFileTransferPart[size];
-        }
-    };
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} is a draft and is not in the
+     * process of sending yet.
+     */
+    public static final int DRAFT = 1;
 
-    protected RcsFileTransferPart(Parcel in) {
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} is actively being sent right
+     * now.
+     */
+    public static final int SENDING = 2;
+
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} was being sent, but the user has
+     * paused the sending process.
+     */
+    public static final int SENDING_PAUSED = 3;
+
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} was attempted, but failed to
+     * send.
+     */
+    public static final int SENDING_FAILED = 4;
+
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} is permanently cancelled to
+     * send.
+     */
+    public static final int SENDING_CANCELLED = 5;
+
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} is actively being downloaded
+     * right now.
+     */
+    public static final int DOWNLOADING = 6;
+
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} was being downloaded, but the
+     * user paused the downloading process.
+     */
+    public static final int DOWNLOADING_PAUSED = 7;
+
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} was attempted, but failed to
+     * download.
+     */
+    public static final int DOWNLOADING_FAILED = 8;
+
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} is permanently cancelled to
+     * download.
+     */
+    public static final int DOWNLOADING_CANCELLED = 9;
+
+    /**
+     * The status to indicate that this {@link RcsFileTransferPart} was successfully sent or
+     * received.
+     */
+    public static final int SUCCEEDED = 10;
+
+    @IntDef({
+            DRAFT, SENDING, SENDING_PAUSED, SENDING_FAILED, SENDING_CANCELLED, DOWNLOADING,
+            DOWNLOADING_PAUSED, DOWNLOADING_FAILED, DOWNLOADING_CANCELLED, SUCCEEDED
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface RcsFileTransferStatus {
     }
 
-    @Override
-    public int describeContents() {
-        return 0;
+    private int mId;
+
+    /**
+     * @hide
+     */
+    RcsFileTransferPart(int id) {
+        mId = id;
     }
 
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
+    /**
+     * @hide
+     */
+    public void setId(int id) {
+        mId = id;
+    }
+
+    /**
+     * @hide
+     */
+    public int getId() {
+        return mId;
+    }
+
+    /**
+     * Sets the RCS file transfer session ID for this file transfer and persists into storage.
+     *
+     * @param sessionId The session ID to be used for this file transfer.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setFileTransferSessionId(String sessionId) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setFileTransferSessionId(mId, sessionId));
+    }
+
+    /**
+     * @return Returns the file transfer session ID.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public String getFileTransferSessionId() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferSessionId(mId));
+    }
+
+    /**
+     * Sets the content URI for this file transfer and persists into storage. The file transfer
+     * should be reachable using this URI.
+     *
+     * @param contentUri The URI for this file transfer.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setContentUri(Uri contentUri) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setFileTransferContentUri(mId, contentUri));
+    }
+
+    /**
+     * @return Returns the URI for this file transfer
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @Nullable
+    @WorkerThread
+    public Uri getContentUri() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferContentUri(mId));
+    }
+
+    /**
+     * Sets the MIME type of this file transfer and persists into storage. Whether this type
+     * actually matches any known or supported types is not checked.
+     *
+     * @param contentMimeType The type of this file transfer.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setContentMimeType(String contentMimeType) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setFileTransferContentType(mId, contentMimeType));
+    }
+
+    /**
+     * @return Returns the content type of this file transfer
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    @Nullable
+    public String getContentMimeType() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferContentType(mId));
+    }
+
+    /**
+     * Sets the content length (i.e. file size) for this file transfer and persists into storage.
+     *
+     * @param contentLength The content length of this file transfer
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setFileSize(long contentLength) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setFileTransferFileSize(mId, contentLength));
+    }
+
+    /**
+     * @return Returns the content length (i.e. file size) for this file transfer.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getFileSize() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferFileSize(mId));
+    }
+
+    /**
+     * Sets the transfer offset for this file transfer and persists into storage. The file transfer
+     * offset is defined as how many bytes have been successfully transferred to the receiver of
+     * this file transfer.
+     *
+     * @param transferOffset The transfer offset for this file transfer.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setTransferOffset(long transferOffset) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setFileTransferTransferOffset(mId, transferOffset));
+    }
+
+    /**
+     * @return Returns the number of bytes that have successfully transferred.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getTransferOffset() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferTransferOffset(mId));
+    }
+
+    /**
+     * Sets the status for this file transfer and persists into storage.
+     *
+     * @param status The status of this file transfer.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setFileTransferStatus(@RcsFileTransferStatus int status)
+            throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setFileTransferStatus(mId, status));
+    }
+
+    /**
+     * @return Returns the status of this file transfer.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public @RcsFileTransferStatus int getFileTransferStatus() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferStatus(mId));
+    }
+
+    /**
+     * @return Returns the width of this multi-media message part in pixels.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public int getWidth() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferWidth(mId));
+    }
+
+    /**
+     * Sets the width of this RCS multi-media message part and persists into storage.
+     *
+     * @param width The width value in pixels
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setWidth(int width) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setFileTransferWidth(mId, width));
+    }
+
+    /**
+     * @return Returns the height of this multi-media message part in pixels.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public int getHeight() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferHeight(mId));
+    }
+
+    /**
+     * Sets the height of this RCS multi-media message part and persists into storage.
+     *
+     * @param height The height value in pixels
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setHeight(int height) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setFileTransferHeight(mId, height));
+    }
+
+    /**
+     * @return Returns the length of this multi-media file (e.g. video or audio) in milliseconds.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getLength() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferLength(mId));
+    }
+
+    /**
+     * Sets the length of this multi-media file (e.g. video or audio) and persists into storage.
+     *
+     * @param length The length of the file in milliseconds.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setLength(long length) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setFileTransferLength(mId, length));
+    }
+
+    /**
+     * @return Returns the URI for the preview of this multi-media file (e.g. an image thumbnail for
+     * a video)
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public Uri getPreviewUri() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferPreviewUri(mId));
+    }
+
+    /**
+     * Sets the URI for the preview of this multi-media file and persists into storage.
+     *
+     * @param previewUri The URI to access to the preview file.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setPreviewUri(Uri previewUri) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setFileTransferPreviewUri(mId, previewUri));
+    }
+
+    /**
+     * @return Returns the MIME type of this multi-media file's preview.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public String getPreviewMimeType() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getFileTransferPreviewType(mId));
+    }
+
+    /**
+     * Sets the MIME type for this multi-media file's preview and persists into storage.
+     *
+     * @param previewMimeType The MIME type for the preview
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setPreviewMimeType(String previewMimeType) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setFileTransferPreviewType(mId, previewMimeType));
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsGroupThread.aidl b/telephony/java/android/telephony/ims/RcsGroupThread.aidl
deleted file mode 100644
index c4ce529..0000000
--- a/telephony/java/android/telephony/ims/RcsGroupThread.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsGroupThread;
diff --git a/telephony/java/android/telephony/ims/RcsGroupThread.java b/telephony/java/android/telephony/ims/RcsGroupThread.java
index d954b2d..6f6258e 100644
--- a/telephony/java/android/telephony/ims/RcsGroupThread.java
+++ b/telephony/java/android/telephony/ims/RcsGroupThread.java
@@ -15,38 +15,191 @@
  */
 package android.telephony.ims;
 
-import android.os.Parcel;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.WorkerThread;
+import android.net.Uri;
+
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Set;
 
 /**
  * RcsGroupThread represents a single RCS conversation thread where {@link RcsParticipant}s can join
- * or leave.
+ * or leave. Please see Section 6 (Group Chat) - GSMA RCC.71 (RCS Universal Profile Service
+ * Definition Document)
+ *
  * @hide - TODO(sahinc) make this public
  */
 public class RcsGroupThread extends RcsThread {
-    public static final Creator<RcsGroupThread> CREATOR = new Creator<RcsGroupThread>() {
-        @Override
-        public RcsGroupThread createFromParcel(Parcel in) {
-            return new RcsGroupThread(in);
-        }
-
-        @Override
-        public RcsGroupThread[] newArray(int size) {
-            return new RcsGroupThread[size];
-        }
-    };
-
-    protected RcsGroupThread(Parcel in) {
-        super(in);
+    /**
+     * Public constructor only for RcsMessageStoreController to initialize new threads.
+     *
+     * @hide
+     */
+    public RcsGroupThread(int threadId) {
+        super(threadId);
     }
 
+    /**
+     * @return Returns {@code true} as this is always a group thread
+     */
     @Override
-    public int describeContents() {
-        return 0;
+    public boolean isGroup() {
+        return true;
     }
 
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeInt(RCS_GROUP_TYPE);
-        super.writeToParcel(dest, flags);
+    /**
+     * @return Returns the given name of this {@link RcsGroupThread}. Please see US6-2 - GSMA RCC.71
+     * (RCS Universal Profile Service Definition Document)
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @Nullable
+    @WorkerThread
+    public String getGroupName() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getGroupThreadName(mThreadId));
+    }
+
+    /**
+     * Sets the name of this {@link RcsGroupThread} and saves it into storage. Please see US6-2 -
+     * GSMA RCC.71 (RCS Universal Profile Service Definition Document)
+     *
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setGroupName(String groupName) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setGroupThreadName(mThreadId, groupName));
+    }
+
+    /**
+     * @return Returns a URI that points to the group's icon {@link RcsGroupThread}. Please see
+     * US6-2 - GSMA RCC.71 (RCS Universal Profile Service Definition Document)
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @Nullable
+    public Uri getGroupIcon() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getGroupThreadIcon(mThreadId));
+    }
+
+    /**
+     * Sets the icon for this {@link RcsGroupThread} and saves it into storage. Please see US6-2 -
+     * GSMA RCC.71 (RCS Universal Profile Service Definition Document)
+     *
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setGroupIcon(@Nullable Uri groupIcon) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setGroupThreadIcon(mThreadId, groupIcon));
+    }
+
+    /**
+     * @return Returns the owner of this thread or {@code null} if there doesn't exist an owner
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @Nullable
+    @WorkerThread
+    public RcsParticipant getOwner() throws RcsMessageStoreException {
+        return new RcsParticipant(RcsControllerCall.call(
+                iRcs -> iRcs.getGroupThreadOwner(mThreadId)));
+    }
+
+    /**
+     * Sets the owner of this {@link RcsGroupThread} and saves it into storage. This is intended to
+     * be used for selecting a new owner for a group thread if the owner leaves the thread. The
+     * owner needs to be in the list of existing participants.
+     *
+     * @param participant The new owner of the thread. {@code null} values are allowed.
+     * @throws RcsMessageStoreException if the operation could not be persisted into storage
+     */
+    @WorkerThread
+    public void setOwner(@Nullable RcsParticipant participant) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setGroupThreadOwner(mThreadId, participant.getId()));
+    }
+
+    /**
+     * Adds a new {@link RcsParticipant} to this group thread and persists into storage. If the user
+     * is actively participating in this {@link RcsGroupThread}, an {@link RcsParticipant} on behalf
+     * of them should be added.
+     *
+     * @param participant The new participant to be added to the thread.
+     * @throws RcsMessageStoreException if the operation could not be persisted into storage
+     */
+    @WorkerThread
+    public void addParticipant(@NonNull RcsParticipant participant)
+            throws RcsMessageStoreException {
+        if (participant == null) {
+            return;
+        }
+
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.addParticipantToGroupThread(mThreadId, participant.getId()));
+    }
+
+    /**
+     * Removes an {@link RcsParticipant} from this group thread and persists into storage. If the
+     * removed participant was the owner of this group, the owner will become null.
+     *
+     * @throws RcsMessageStoreException if the operation could not be persisted into storage
+     */
+    @WorkerThread
+    public void removeParticipant(@NonNull RcsParticipant participant)
+            throws RcsMessageStoreException {
+        if (participant == null) {
+            return;
+        }
+
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.removeParticipantFromGroupThread(mThreadId, participant.getId()));
+    }
+
+    /**
+     * Returns the set of {@link RcsParticipant}s that contribute to this group thread. The
+     * returned set does not support modifications, please use
+     * {@link RcsGroupThread#addParticipant(RcsParticipant)}
+     * and {@link RcsGroupThread#removeParticipant(RcsParticipant)} instead.
+     *
+     * @return the immutable set of {@link RcsParticipant} in this group thread.
+     * @throws RcsMessageStoreException if the values could not be read from the storage
+     */
+    @WorkerThread
+    @NonNull
+    public Set<RcsParticipant> getParticipants() throws RcsMessageStoreException {
+        RcsParticipantQueryParameters queryParameters =
+                new RcsParticipantQueryParameters.Builder().setThread(this).build();
+
+        RcsParticipantQueryResult queryResult = RcsControllerCall.call(
+                iRcs -> iRcs.getParticipants(queryParameters));
+
+        List<RcsParticipant> participantList = queryResult.getParticipants();
+        Set<RcsParticipant> participantSet = new LinkedHashSet<>(participantList);
+        return Collections.unmodifiableSet(participantSet);
+    }
+
+    /**
+     * Returns the conference URI for this {@link RcsGroupThread}. Please see 4.4.5.2 - GSMA RCC.53
+     * (RCS Device API 1.6 Specification
+     *
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @Nullable
+    @WorkerThread
+    public Uri getConferenceUri() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getGroupThreadConferenceUri(mThreadId));
+    }
+
+    /**
+     * Sets the conference URI for this {@link RcsGroupThread} and persists into storage. Please see
+     * 4.4.5.2 - GSMA RCC.53 (RCS Device API 1.6 Specification
+     *
+     * @param conferenceUri The URI as String to be used as the conference URI.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @Nullable
+    @WorkerThread
+    public void setConferenceUri(Uri conferenceUri) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setGroupThreadConferenceUri(mThreadId, conferenceUri));
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsThreadEvent.aidl b/telephony/java/android/telephony/ims/RcsGroupThreadEvent.aidl
similarity index 95%
rename from telephony/java/android/telephony/ims/RcsThreadEvent.aidl
rename to telephony/java/android/telephony/ims/RcsGroupThreadEvent.aidl
index 4a40d89..77a2372 100644
--- a/telephony/java/android/telephony/ims/RcsThreadEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadEvent.aidl
@@ -1,5 +1,4 @@
 /*
- *
  * Copyright 2019, The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -17,4 +16,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadEvent;
+parcelable RcsGroupThreadEvent;
diff --git a/telephony/java/android/telephony/ims/RcsGroupThreadEvent.java b/telephony/java/android/telephony/ims/RcsGroupThreadEvent.java
new file mode 100644
index 0000000..a18437b
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadEvent.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.telephony.ims;
+
+import android.annotation.NonNull;
+import android.os.Parcel;
+
+/**
+ * An event that happened on an {@link RcsGroupThread}.
+ *
+ * @hide - TODO(109759350) make this public
+ */
+public abstract class RcsGroupThreadEvent extends RcsEvent {
+    private final int mRcsGroupThreadId;
+    private final int mOriginatingParticipantId;
+
+    RcsGroupThreadEvent(long timestamp, int rcsGroupThreadId,
+            int originatingParticipantId) {
+        super(timestamp);
+        mRcsGroupThreadId = rcsGroupThreadId;
+        mOriginatingParticipantId = originatingParticipantId;
+    }
+
+    /**
+     * @return Returns the {@link RcsGroupThread} that this event happened on.
+     */
+    @NonNull
+    public RcsGroupThread getRcsGroupThread() {
+        return new RcsGroupThread(mRcsGroupThreadId);
+    }
+
+    /**
+     * @return Returns the {@link RcsParticipant} that performed the event.
+     */
+    @NonNull
+    public RcsParticipant getOriginatingParticipant() {
+        return new RcsParticipant(mOriginatingParticipantId);
+    }
+
+    RcsGroupThreadEvent(Parcel in) {
+        super(in);
+        mRcsGroupThreadId = in.readInt();
+        mOriginatingParticipantId = in.readInt();
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeInt(mRcsGroupThreadId);
+        dest.writeInt(mOriginatingParticipantId);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsGroupThreadIconChangedEvent.aidl
similarity index 93%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsGroupThreadIconChangedEvent.aidl
index 82d985d..daea792 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadIconChangedEvent.aidl
@@ -1,5 +1,4 @@
 /*
- *
  * Copyright 2019, The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -17,4 +16,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsGroupThreadIconChangedEvent;
diff --git a/telephony/java/android/telephony/ims/RcsGroupThreadIconChangedEvent.java b/telephony/java/android/telephony/ims/RcsGroupThreadIconChangedEvent.java
new file mode 100644
index 0000000..7beed3b
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadIconChangedEvent.java
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.telephony.ims;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.Uri;
+import android.os.Parcel;
+
+/**
+ * An event that indicates an {@link RcsGroupThread}'s icon was changed. Please see R6-2-5 - GSMA
+ * RCC.71 (RCS Universal Profile Service Definition Document)
+ *
+ * @hide - TODO(109759350) make this public
+ */
+public class RcsGroupThreadIconChangedEvent extends RcsGroupThreadEvent {
+    private final Uri mNewIcon;
+
+    /**
+     * Creates a new {@link RcsGroupThreadIconChangedEvent}. This event is not persisted into
+     * storage until {@link RcsMessageStore#persistRcsEvent(RcsEvent)} is called.
+     *
+     * @param timestamp The timestamp of when this event happened, in milliseconds passed after
+     *                  midnight, January 1st, 1970 UTC
+     * @param rcsGroupThread The {@link RcsGroupThread} that this event happened on
+     * @param originatingParticipant The {@link RcsParticipant} that changed the
+     *                               {@link RcsGroupThread}'s icon.
+     * @param newIcon {@link Uri} to the new icon of this {@link RcsGroupThread}
+     * @see RcsMessageStore#persistRcsEvent(RcsEvent)
+     */
+    public RcsGroupThreadIconChangedEvent(long timestamp, @NonNull RcsGroupThread rcsGroupThread,
+            @NonNull RcsParticipant originatingParticipant, @Nullable Uri newIcon) {
+        super(timestamp, rcsGroupThread.getThreadId(), originatingParticipant.getId());
+        mNewIcon = newIcon;
+    }
+
+    /**
+     * @hide - internal constructor for queries
+     */
+    public RcsGroupThreadIconChangedEvent(long timestamp, int rcsGroupThreadId,
+            int originatingParticipantId, @Nullable Uri newIcon) {
+        super(timestamp, rcsGroupThreadId, originatingParticipantId);
+        mNewIcon = newIcon;
+    }
+
+    /**
+     * @return Returns the {@link Uri} to the icon of the {@link RcsGroupThread} after this
+     * {@link RcsGroupThreadIconChangedEvent} occured.
+     */
+    @Nullable
+    public Uri getNewIcon() {
+        return mNewIcon;
+    }
+
+    /**
+     * Persists the event to the data store.
+     *
+     * @hide - not meant for public use.
+     */
+    @Override
+    public void persist() throws RcsMessageStoreException {
+        // TODO ensure failure throws
+        RcsControllerCall.call(iRcs -> iRcs.createGroupThreadIconChangedEvent(
+                getTimestamp(), getRcsGroupThread().getThreadId(),
+                getOriginatingParticipant().getId(), mNewIcon));
+    }
+
+    public static final Creator<RcsGroupThreadIconChangedEvent> CREATOR =
+            new Creator<RcsGroupThreadIconChangedEvent>() {
+                @Override
+                public RcsGroupThreadIconChangedEvent createFromParcel(Parcel in) {
+                    return new RcsGroupThreadIconChangedEvent(in);
+                }
+
+                @Override
+                public RcsGroupThreadIconChangedEvent[] newArray(int size) {
+                    return new RcsGroupThreadIconChangedEvent[size];
+                }
+            };
+
+    protected RcsGroupThreadIconChangedEvent(Parcel in) {
+        super(in);
+        mNewIcon = in.readParcelable(Uri.class.getClassLoader());
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeParcelable(mNewIcon, flags);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsGroupThreadNameChangedEvent.aidl
similarity index 93%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsGroupThreadNameChangedEvent.aidl
index 82d985d..3ed9bd1 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadNameChangedEvent.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsGroupThreadNameChangedEvent;
diff --git a/telephony/java/android/telephony/ims/RcsGroupThreadNameChangedEvent.java b/telephony/java/android/telephony/ims/RcsGroupThreadNameChangedEvent.java
new file mode 100644
index 0000000..0d2ea4f
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadNameChangedEvent.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.telephony.ims;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Parcel;
+
+/**
+ * An event that indicates an {@link RcsGroupThread}'s name was changed. Please see R6-2-5 - GSMA
+ * RCC.71 (RCS Universal Profile Service Definition Document)
+ *
+ * @hide - TODO(109759350) make this public
+ */
+public class RcsGroupThreadNameChangedEvent extends RcsGroupThreadEvent {
+    private String mNewName;
+
+    /**
+     * Creates a new {@link RcsGroupThreadNameChangedEvent}. This event is not persisted into
+     * storage until {@link RcsMessageStore#persistRcsEvent(RcsEvent)} is called.
+     *
+     * @param timestamp The timestamp of when this event happened, in milliseconds passed after
+     *                  midnight, January 1st, 1970 UTC
+     * @param rcsGroupThread The {@link RcsGroupThread} that this event happened on
+     * @param originatingParticipant The {@link RcsParticipant} that changed the
+     *                               {@link RcsGroupThread}'s icon.
+     * @param newName The new name of the {@link RcsGroupThread}
+     * @see RcsMessageStore#persistRcsEvent(RcsEvent)
+     */
+    public RcsGroupThreadNameChangedEvent(long timestamp, @NonNull RcsGroupThread rcsGroupThread,
+            @NonNull RcsParticipant originatingParticipant, @Nullable String newName) {
+        super(timestamp, rcsGroupThread.getThreadId(), originatingParticipant.getId());
+        mNewName = newName;
+    }
+
+    /**
+     * @hide - internal constructor for queries
+     */
+    public RcsGroupThreadNameChangedEvent(long timestamp, int rcsGroupThreadId,
+            int originatingParticipantId, @Nullable String newName) {
+        super(timestamp, rcsGroupThreadId, originatingParticipantId);
+        mNewName = newName;
+    }
+
+    /**
+     * @return Returns the name of this {@link RcsGroupThread} after this
+     * {@link RcsGroupThreadNameChangedEvent} happened.
+     */
+    @Nullable
+    public String getNewName() {
+        return mNewName;
+    }
+
+    /**
+     * Persists the event to the data store.
+     *
+     * @hide - not meant for public use.
+     */
+    @Override
+    public void persist() throws RcsMessageStoreException {
+        RcsControllerCall.call(iRcs -> iRcs.createGroupThreadNameChangedEvent(
+                getTimestamp(), getRcsGroupThread().getThreadId(),
+                getOriginatingParticipant().getId(), mNewName));
+    }
+
+    public static final Creator<RcsGroupThreadNameChangedEvent> CREATOR =
+            new Creator<RcsGroupThreadNameChangedEvent>() {
+                @Override
+                public RcsGroupThreadNameChangedEvent createFromParcel(Parcel in) {
+                    return new RcsGroupThreadNameChangedEvent(in);
+                }
+
+                @Override
+                public RcsGroupThreadNameChangedEvent[] newArray(int size) {
+                    return new RcsGroupThreadNameChangedEvent[size];
+                }
+            };
+
+    protected RcsGroupThreadNameChangedEvent(Parcel in) {
+        super(in);
+        mNewName = in.readString();
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeString(mNewName);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsMessage.aidl b/telephony/java/android/telephony/ims/RcsGroupThreadParticipantJoinedEvent.aidl
similarity index 92%
copy from telephony/java/android/telephony/ims/RcsMessage.aidl
copy to telephony/java/android/telephony/ims/RcsGroupThreadParticipantJoinedEvent.aidl
index b32cd12..420abff 100644
--- a/telephony/java/android/telephony/ims/RcsMessage.aidl
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadParticipantJoinedEvent.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsMessage;
+parcelable RcsGroupThreadParticipantJoinedEvent;
diff --git a/telephony/java/android/telephony/ims/RcsGroupThreadParticipantJoinedEvent.java b/telephony/java/android/telephony/ims/RcsGroupThreadParticipantJoinedEvent.java
new file mode 100644
index 0000000..2adafc7
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadParticipantJoinedEvent.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.telephony.ims;
+
+import android.annotation.NonNull;
+import android.os.Parcel;
+
+/**
+ * An event that indicates an RCS participant has joined an {@link RcsThread}. Please see US6-3 -
+ * GSMA RCC.71 (RCS Universal Profile Service Definition Document)
+ *
+ * @hide - TODO(109759350) make this public
+ */
+public class RcsGroupThreadParticipantJoinedEvent extends RcsGroupThreadEvent {
+    private int mJoinedParticipantId;
+
+    /**
+     * Creates a new {@link RcsGroupThreadParticipantJoinedEvent}. This event is not persisted into
+     * storage until {@link RcsMessageStore#persistRcsEvent(RcsEvent)} is called.
+     *
+     * @param timestamp The timestamp of when this event happened, in milliseconds passed after
+     *                  midnight, January 1st, 1970 UTC
+     * @param rcsGroupThread The {@link RcsGroupThread} that this event happened on
+     * @param originatingParticipant The {@link RcsParticipant} that added or invited the new
+     *                               {@link RcsParticipant} into the {@link RcsGroupThread}
+     * @param joinedParticipant The new {@link RcsParticipant} that joined the
+     *                          {@link RcsGroupThread}
+     * @see RcsMessageStore#persistRcsEvent(RcsEvent)
+     */
+    public RcsGroupThreadParticipantJoinedEvent(long timestamp,
+            @NonNull RcsGroupThread rcsGroupThread, @NonNull RcsParticipant originatingParticipant,
+            @NonNull RcsParticipant joinedParticipant) {
+        super(timestamp, rcsGroupThread.getThreadId(), originatingParticipant.getId());
+        mJoinedParticipantId = joinedParticipant.getId();
+    }
+
+    /**
+     * @hide - internal constructor for queries
+     */
+    public RcsGroupThreadParticipantJoinedEvent(long timestamp, int rcsGroupThreadId,
+            int originatingParticipantId, int joinedParticipantId) {
+        super(timestamp, rcsGroupThreadId, originatingParticipantId);
+        mJoinedParticipantId = joinedParticipantId;
+    }
+
+    /**
+     * @return Returns the {@link RcsParticipant} that joined the associated {@link RcsGroupThread}
+     */
+    public RcsParticipant getJoinedParticipant() {
+        return new RcsParticipant(mJoinedParticipantId);
+    }
+
+    /**
+     * Persists the event to the data store.
+     *
+     * @hide - not meant for public use.
+     */
+    @Override
+    public void persist() throws RcsMessageStoreException {
+        RcsControllerCall.call(
+                iRcs -> iRcs.createGroupThreadParticipantJoinedEvent(getTimestamp(),
+                        getRcsGroupThread().getThreadId(), getOriginatingParticipant().getId(),
+                        getJoinedParticipant().getId()));
+    }
+
+    public static final Creator<RcsGroupThreadParticipantJoinedEvent> CREATOR =
+            new Creator<RcsGroupThreadParticipantJoinedEvent>() {
+                @Override
+                public RcsGroupThreadParticipantJoinedEvent createFromParcel(Parcel in) {
+                    return new RcsGroupThreadParticipantJoinedEvent(in);
+                }
+
+                @Override
+                public RcsGroupThreadParticipantJoinedEvent[] newArray(int size) {
+                    return new RcsGroupThreadParticipantJoinedEvent[size];
+                }
+            };
+
+    protected RcsGroupThreadParticipantJoinedEvent(Parcel in) {
+        super(in);
+        mJoinedParticipantId = in.readInt();
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeInt(mJoinedParticipantId);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsMessage.aidl b/telephony/java/android/telephony/ims/RcsGroupThreadParticipantLeftEvent.aidl
similarity index 92%
rename from telephony/java/android/telephony/ims/RcsMessage.aidl
rename to telephony/java/android/telephony/ims/RcsGroupThreadParticipantLeftEvent.aidl
index b32cd12..ff139ac 100644
--- a/telephony/java/android/telephony/ims/RcsMessage.aidl
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadParticipantLeftEvent.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsMessage;
+parcelable RcsGroupThreadParticipantLeftEvent;
diff --git a/telephony/java/android/telephony/ims/RcsGroupThreadParticipantLeftEvent.java b/telephony/java/android/telephony/ims/RcsGroupThreadParticipantLeftEvent.java
new file mode 100644
index 0000000..87c1852
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsGroupThreadParticipantLeftEvent.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.telephony.ims;
+
+import android.annotation.NonNull;
+import android.os.Parcel;
+
+/**
+ * An event that indicates an RCS participant has left an {@link RcsThread}. Please see US6-23 -
+ * GSMA RCC.71 (RCS Universal Profile Service Definition Document)
+ *
+ * @hide - TODO(109759350) make this public
+ */
+public class RcsGroupThreadParticipantLeftEvent extends RcsGroupThreadEvent {
+    private int mLeavingParticipantId;
+
+    /**
+     * Creates a new {@link RcsGroupThreadParticipantLeftEvent}. his event is not persisted into
+     * storage until {@link RcsMessageStore#persistRcsEvent(RcsEvent)} is called.
+     *
+     * @param timestamp The timestamp of when this event happened, in milliseconds passed after
+     *                  midnight, January 1st, 1970 UTC
+     * @param rcsGroupThread The {@link RcsGroupThread} that this event happened on
+     * @param originatingParticipant The {@link RcsParticipant} that removed the
+     *                               {@link RcsParticipant} from the {@link RcsGroupThread}. It is
+     *                               possible that originatingParticipant and leavingParticipant are
+     *                               the same (i.e. {@link RcsParticipant} left the group
+     *                               themselves)
+     * @param leavingParticipant The {@link RcsParticipant} that left the {@link RcsGroupThread}
+     * @see RcsMessageStore#persistRcsEvent(RcsEvent)
+     */
+    public RcsGroupThreadParticipantLeftEvent(long timestamp,
+            @NonNull RcsGroupThread rcsGroupThread, @NonNull RcsParticipant originatingParticipant,
+            @NonNull RcsParticipant leavingParticipant) {
+        super(timestamp, rcsGroupThread.getThreadId(), originatingParticipant.getId());
+        mLeavingParticipantId = leavingParticipant.getId();
+    }
+
+    /**
+     * @hide - internal constructor for queries
+     */
+    public RcsGroupThreadParticipantLeftEvent(long timestamp, int rcsGroupThreadId,
+            int originatingParticipantId, int leavingParticipantId) {
+        super(timestamp, rcsGroupThreadId, originatingParticipantId);
+        mLeavingParticipantId = leavingParticipantId;
+    }
+
+    /**
+     * @return Returns the {@link RcsParticipant} that left the associated {@link RcsGroupThread}
+     * after this {@link RcsGroupThreadParticipantLeftEvent} happened.
+     */
+    @NonNull
+    public RcsParticipant getLeavingParticipantId() {
+        return new RcsParticipant(mLeavingParticipantId);
+    }
+
+    @Override
+    public void persist() throws RcsMessageStoreException {
+        RcsControllerCall.call(
+                iRcs -> iRcs.createGroupThreadParticipantJoinedEvent(getTimestamp(),
+                        getRcsGroupThread().getThreadId(), getOriginatingParticipant().getId(),
+                        getLeavingParticipantId().getId()));
+    }
+
+    public static final Creator<RcsGroupThreadParticipantLeftEvent> CREATOR =
+            new Creator<RcsGroupThreadParticipantLeftEvent>() {
+                @Override
+                public RcsGroupThreadParticipantLeftEvent createFromParcel(Parcel in) {
+                    return new RcsGroupThreadParticipantLeftEvent(in);
+                }
+
+                @Override
+                public RcsGroupThreadParticipantLeftEvent[] newArray(int size) {
+                    return new RcsGroupThreadParticipantLeftEvent[size];
+                }
+            };
+
+    protected RcsGroupThreadParticipantLeftEvent(Parcel in) {
+        super(in);
+        mLeavingParticipantId = in.readInt();
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeInt(mLeavingParticipantId);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsIncomingMessage.aidl b/telephony/java/android/telephony/ims/RcsIncomingMessage.aidl
deleted file mode 100644
index 6552a82..0000000
--- a/telephony/java/android/telephony/ims/RcsIncomingMessage.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsIncomingMessage;
diff --git a/telephony/java/android/telephony/ims/RcsIncomingMessage.java b/telephony/java/android/telephony/ims/RcsIncomingMessage.java
index f39e06d..2ea115b 100644
--- a/telephony/java/android/telephony/ims/RcsIncomingMessage.java
+++ b/telephony/java/android/telephony/ims/RcsIncomingMessage.java
@@ -15,34 +15,82 @@
  */
 package android.telephony.ims;
 
-import android.os.Parcel;
+import android.annotation.WorkerThread;
 
 /**
  * This is a single instance of a message received over RCS.
- * @hide - TODO(sahinc) make this public
+ *
+ * @hide - TODO(109759350) make this public
  */
 public class RcsIncomingMessage extends RcsMessage {
-    public static final Creator<RcsIncomingMessage> CREATOR = new Creator<RcsIncomingMessage>() {
-        @Override
-        public RcsIncomingMessage createFromParcel(Parcel in) {
-            return new RcsIncomingMessage(in);
-        }
-
-        @Override
-        public RcsIncomingMessage[] newArray(int size) {
-            return new RcsIncomingMessage[size];
-        }
-    };
-
-    protected RcsIncomingMessage(Parcel in) {
+    /**
+     * @hide
+     */
+    RcsIncomingMessage(int id) {
+        super(id);
     }
 
-    @Override
-    public int describeContents() {
-        return 0;
+    /**
+     * Sets the timestamp of arrival for this message and persists into storage. The timestamp is
+     * defined as milliseconds passed after midnight, January 1, 1970 UTC
+     *
+     * @param arrivalTimestamp The timestamp to set to.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setArrivalTimestamp(long arrivalTimestamp) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setMessageArrivalTimestamp(mId, true, arrivalTimestamp));
     }
 
+    /**
+     * @return Returns the timestamp of arrival for this message. The timestamp is defined as
+     * milliseconds passed after midnight, January 1, 1970 UTC
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getArrivalTimestamp() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getMessageArrivalTimestamp(mId, true));
+    }
+
+    /**
+     * Sets the timestamp of when the user saw this message and persists into storage. The timestamp
+     * is defined as milliseconds passed after midnight, January 1, 1970 UTC
+     *
+     * @param notifiedTimestamp The timestamp to set to.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setSeenTimestamp(long notifiedTimestamp) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setMessageSeenTimestamp(mId, true, notifiedTimestamp));
+    }
+
+    /**
+     * @return Returns the timestamp of when the user saw this message. The timestamp is defined as
+     * milliseconds passed after midnight, January 1, 1970 UTC
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getSeenTimestamp() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getMessageSeenTimestamp(mId, true));
+    }
+
+    /**
+     * @return Returns the sender of this incoming message.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public RcsParticipant getSenderParticipant() throws RcsMessageStoreException {
+        return new RcsParticipant(
+                RcsControllerCall.call(iRcs -> iRcs.getSenderParticipant(mId)));
+    }
+
+    /**
+     * @return Returns {@code true} as this is an incoming message
+     */
     @Override
-    public void writeToParcel(Parcel dest, int flags) {
+    public boolean isIncoming() {
+        return true;
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsIncomingMessageCreationParameters.aidl
similarity index 92%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsIncomingMessageCreationParameters.aidl
index 82d985d..76073c2 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsIncomingMessageCreationParameters.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsIncomingMessageCreationParameters;
diff --git a/telephony/java/android/telephony/ims/RcsIncomingMessageCreationParameters.java b/telephony/java/android/telephony/ims/RcsIncomingMessageCreationParameters.java
new file mode 100644
index 0000000..acde8af
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsIncomingMessageCreationParameters.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import android.annotation.CheckResult;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * {@link RcsIncomingMessageCreationParameters} is a collection of parameters that should be passed
+ * into {@link RcsThread#addIncomingMessage(RcsIncomingMessageCreationParameters)} to generate an
+ * {@link RcsIncomingMessage} on that {@link RcsThread}
+ *
+ * @hide TODO:make public
+ */
+public class RcsIncomingMessageCreationParameters extends RcsMessageCreationParameters implements
+        Parcelable {
+    // The arrival timestamp for the RcsIncomingMessage to be created
+    private final long mArrivalTimestamp;
+    // The seen timestamp for the RcsIncomingMessage to be created
+    private final long mSeenTimestamp;
+    // The participant that sent this incoming message
+    private final int mSenderParticipantId;
+
+    /**
+     * Builder to help create an {@link RcsIncomingMessageCreationParameters}
+     *
+     * @see RcsThread#addIncomingMessage(RcsIncomingMessageCreationParameters)
+     */
+    public static class Builder extends RcsMessageCreationParameters.Builder {
+        private RcsParticipant mSenderParticipant;
+        private long mArrivalTimestamp;
+        private long mSeenTimestamp;
+
+        /**
+         * Creates a {@link Builder} to create an instance of
+         * {@link RcsIncomingMessageCreationParameters}
+         *
+         * @param originationTimestamp The timestamp of {@link RcsMessage} creation. The origination
+         *                             timestamp value in milliseconds passed after midnight,
+         *                             January 1, 1970 UTC
+         * @param arrivalTimestamp The timestamp of arrival, defined as milliseconds passed after
+         *                         midnight, January 1, 1970 UTC
+         * @param subscriptionId The subscription ID that was used to send or receive this
+         *                       {@link RcsMessage}
+         */
+        public Builder(long originationTimestamp, long arrivalTimestamp, int subscriptionId) {
+            super(originationTimestamp, subscriptionId);
+            mArrivalTimestamp = arrivalTimestamp;
+        }
+
+        /**
+         * Sets the {@link RcsParticipant} that send this {@link RcsIncomingMessage}
+         *
+         * @param senderParticipant The {@link RcsParticipant} that sent this
+         * {@link RcsIncomingMessage}
+         * @return The same instance of {@link Builder} to chain methods.
+         */
+        @CheckResult
+        public Builder setSenderParticipant(RcsParticipant senderParticipant) {
+            mSenderParticipant = senderParticipant;
+            return this;
+        }
+
+        /**
+         * Sets the time of the arrival of this {@link RcsIncomingMessage}
+
+         * @return The same instance of {@link Builder} to chain methods.
+         * @see RcsIncomingMessage#setArrivalTimestamp(long)
+         */
+        @CheckResult
+        public Builder setArrivalTimestamp(long arrivalTimestamp) {
+            mArrivalTimestamp = arrivalTimestamp;
+            return this;
+        }
+
+        /**
+         * Sets the time of the when this user saw the {@link RcsIncomingMessage}
+         * @param seenTimestamp The seen timestamp , defined as milliseconds passed after midnight,
+         *                      January 1, 1970 UTC
+         * @return The same instance of {@link Builder} to chain methods.
+         * @see RcsIncomingMessage#setSeenTimestamp(long)
+         */
+        @CheckResult
+        public Builder setSeenTimestamp(long seenTimestamp) {
+            mSeenTimestamp = seenTimestamp;
+            return this;
+        }
+
+        /**
+         * Creates parameters for creating a new incoming message.
+         * @return A new instance of {@link RcsIncomingMessageCreationParameters} to create a new
+         * {@link RcsIncomingMessage}
+         */
+        public RcsIncomingMessageCreationParameters build() {
+            return new RcsIncomingMessageCreationParameters(this);
+        }
+    }
+
+    private RcsIncomingMessageCreationParameters(Builder builder) {
+        super(builder);
+        mArrivalTimestamp = builder.mArrivalTimestamp;
+        mSeenTimestamp = builder.mSeenTimestamp;
+        mSenderParticipantId = builder.mSenderParticipant.getId();
+    }
+
+    protected RcsIncomingMessageCreationParameters(Parcel in) {
+        super(in);
+        mArrivalTimestamp = in.readLong();
+        mSeenTimestamp = in.readLong();
+        mSenderParticipantId = in.readInt();
+    }
+
+    /**
+     * @return Returns the arrival timestamp for the {@link RcsIncomingMessage} to be created.
+     * Timestamp is defined as milliseconds passed after midnight, January 1, 1970 UTC
+     */
+    public long getArrivalTimestamp() {
+        return mArrivalTimestamp;
+    }
+
+    /**
+     * @return Returns the seen timestamp for the {@link RcsIncomingMessage} to be created.
+     * Timestamp is defined as milliseconds passed after midnight, January 1, 1970 UTC
+     */
+    public long getSeenTimestamp() {
+        return mSeenTimestamp;
+    }
+
+    /**
+     * Helper getter for {@link com.android.internal.telephony.ims.RcsMessageStoreController} to
+     * create {@link RcsIncomingMessage}s
+     *
+     * Since the API doesn't expose any ID's to API users, this should be hidden.
+     * @hide
+     */
+    public int getSenderParticipantId() {
+        return mSenderParticipantId;
+    }
+
+    public static final Creator<RcsIncomingMessageCreationParameters> CREATOR =
+            new Creator<RcsIncomingMessageCreationParameters>() {
+                @Override
+                public RcsIncomingMessageCreationParameters createFromParcel(Parcel in) {
+                    return new RcsIncomingMessageCreationParameters(in);
+                }
+
+                @Override
+                public RcsIncomingMessageCreationParameters[] newArray(int size) {
+                    return new RcsIncomingMessageCreationParameters[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeLong(mArrivalTimestamp);
+        dest.writeLong(mSeenTimestamp);
+        dest.writeInt(mSenderParticipantId);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsLocationPart.aidl b/telephony/java/android/telephony/ims/RcsLocationPart.aidl
deleted file mode 100644
index 4fe5ca9..0000000
--- a/telephony/java/android/telephony/ims/RcsLocationPart.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsLocationPart;
diff --git a/telephony/java/android/telephony/ims/RcsLocationPart.java b/telephony/java/android/telephony/ims/RcsLocationPart.java
deleted file mode 100644
index 19be4ce..0000000
--- a/telephony/java/android/telephony/ims/RcsLocationPart.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcel;
-
-/**
- * A part of a composite {@link RcsMessage} that holds a location
- * @hide - TODO(sahinc) make this public
- */
-public class RcsLocationPart extends RcsPart {
-    public static final Creator<RcsLocationPart> CREATOR = new Creator<RcsLocationPart>() {
-        @Override
-        public RcsLocationPart createFromParcel(Parcel in) {
-            return new RcsLocationPart(in);
-        }
-
-        @Override
-        public RcsLocationPart[] newArray(int size) {
-            return new RcsLocationPart[size];
-        }
-    };
-
-    protected RcsLocationPart(Parcel in) {
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-    }
-}
diff --git a/telephony/java/android/telephony/ims/RcsManager.aidl b/telephony/java/android/telephony/ims/RcsManager.aidl
deleted file mode 100644
index 63bc71c..0000000
--- a/telephony/java/android/telephony/ims/RcsManager.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsManager;
diff --git a/telephony/java/android/telephony/ims/RcsManager.java b/telephony/java/android/telephony/ims/RcsManager.java
index df108c8..e84d4ed 100644
--- a/telephony/java/android/telephony/ims/RcsManager.java
+++ b/telephony/java/android/telephony/ims/RcsManager.java
@@ -28,7 +28,7 @@
     private static final RcsMessageStore sRcsMessageStoreInstance = new RcsMessageStore();
 
     /**
-     * Returns an instance of RcsMessageStore.
+     * Returns an instance of {@link RcsMessageStore}
      */
     public RcsMessageStore getRcsMessageStore() {
         return sRcsMessageStoreInstance;
diff --git a/telephony/java/android/telephony/ims/RcsMessage.java b/telephony/java/android/telephony/ims/RcsMessage.java
index d46685c..b70a9a7 100644
--- a/telephony/java/android/telephony/ims/RcsMessage.java
+++ b/telephony/java/android/telephony/ims/RcsMessage.java
@@ -15,11 +15,314 @@
  */
 package android.telephony.ims;
 
-import android.os.Parcelable;
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.WorkerThread;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
 
 /**
  * This is a single instance of a message sent or received over RCS.
- * @hide - TODO(sahinc) make this public
+ *
+ * @hide - TODO(109759350) make this public
  */
-public abstract class RcsMessage implements Parcelable {
+public abstract class RcsMessage {
+    /**
+     * The value to indicate that this {@link RcsMessage} does not have any location information.
+     */
+    public static final double LOCATION_NOT_SET = Double.MIN_VALUE;
+
+    /**
+     * The status to indicate that this {@link RcsMessage}s status is not set yet.
+     */
+    public static final int NOT_SET = 0;
+
+    /**
+     * The status to indicate that this {@link RcsMessage} is a draft and is not in the process of
+     * sending yet.
+     */
+    public static final int DRAFT = 1;
+
+    /**
+     * The status to indicate that this {@link RcsMessage} was successfully sent.
+     */
+    public static final int QUEUED = 2;
+
+    /**
+     * The status to indicate that this {@link RcsMessage} is actively being sent.
+     */
+    public static final int SENDING = 3;
+
+    /**
+     * The status to indicate that this {@link RcsMessage} was successfully sent.
+     */
+    public static final int SENT = 4;
+
+    /**
+     * The status to indicate that this {@link RcsMessage} failed to send in an attempt before, and
+     * now being retried.
+     */
+    public static final int RETRYING = 5;
+
+    /**
+     * The status to indicate that this {@link RcsMessage} has permanently failed to send.
+     */
+    public static final int FAILED = 6;
+
+    /**
+     * The status to indicate that this {@link RcsMessage} was successfully received.
+     */
+    public static final int RECEIVED = 7;
+
+    /**
+     * The status to indicate that this {@link RcsMessage} was seen.
+     */
+    public static final int SEEN = 9;
+
+    protected int mId;
+
+    @IntDef({
+            DRAFT, QUEUED, SENDING, SENT, RETRYING, FAILED, RECEIVED, SEEN
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface RcsMessageStatus {
+    }
+
+    RcsMessage(int id) {
+        mId = id;
+    }
+
+    /**
+     * Returns the row Id from the common message.
+     *
+     * @hide
+     */
+    public int getId() {
+        return mId;
+    }
+
+    /**
+     * @return Returns the subscription ID that this {@link RcsMessage} was sent from, or delivered
+     * to.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     * @see android.telephony.SubscriptionInfo#getSubscriptionId
+     */
+    public int getSubscriptionId() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getMessageSubId(mId, isIncoming()));
+    }
+
+    /**
+     * Sets the subscription ID that this {@link RcsMessage} was sent from, or delivered to and
+     * persists it into storage.
+     *
+     * @param subId The subscription ID to persists into storage.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     * @see android.telephony.SubscriptionInfo#getSubscriptionId
+     */
+    @WorkerThread
+    public void setSubscriptionId(int subId) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setMessageSubId(mId, isIncoming(), subId));
+    }
+
+    /**
+     * Sets the status of this message and persists it into storage. Please see
+     * {@link RcsFileTransferPart#setFileTransferStatus(int)} to set statuses around file transfers.
+     *
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setStatus(@RcsMessageStatus int rcsMessageStatus) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setMessageStatus(mId, isIncoming(), rcsMessageStatus));
+    }
+
+    /**
+     * @return Returns the status of this message. Please see
+     * {@link RcsFileTransferPart#setFileTransferStatus(int)} to set statuses around file transfers.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public @RcsMessageStatus int getStatus() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getMessageStatus(mId, isIncoming()));
+    }
+
+    /**
+     * Sets the origination timestamp of this message and persists it into storage. Origination is
+     * defined as when the sender tapped the send button.
+     *
+     * @param timestamp The origination timestamp value in milliseconds passed after midnight,
+     *                  January 1, 1970 UTC
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setOriginationTimestamp(long timestamp) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setMessageOriginationTimestamp(mId, isIncoming(), timestamp));
+    }
+
+    /**
+     * @return Returns the origination timestamp of this message in milliseconds passed after
+     * midnight, January 1, 1970 UTC. Origination is defined as when the sender tapped the send
+     * button.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getOriginationTimestamp() throws RcsMessageStoreException {
+        return RcsControllerCall.call(
+                iRcs -> iRcs.getMessageOriginationTimestamp(mId, isIncoming()));
+    }
+
+    /**
+     * Sets the globally unique RCS message identifier for this message and persists it into
+     * storage. This function does not confirm that this message id is unique. Please see 4.4.5.2
+     * - GSMA RCC.53 (RCS Device API 1.6 Specification
+     *
+     * @param rcsMessageGlobalId The globally RCS message identifier
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setRcsMessageId(String rcsMessageGlobalId) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setGlobalMessageIdForMessage(mId, isIncoming(), rcsMessageGlobalId));
+    }
+
+    /**
+     * @return Returns the globally unique RCS message identifier for this message. Please see
+     * 4.4.5.2 - GSMA RCC.53 (RCS Device API 1.6 Specification
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public String getRcsMessageId() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getGlobalMessageIdForMessage(mId, isIncoming()));
+    }
+
+    /**
+     * @return Returns the user visible text included in this message.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public String getText() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getTextForMessage(mId, isIncoming()));
+    }
+
+    /**
+     * Sets the user visible text for this message and persists in storage.
+     *
+     * @param text The text this message now has
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setText(String text) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setTextForMessage(mId, isIncoming(), text));
+    }
+
+    /**
+     * @return Returns the associated latitude for this message, or
+     * {@link RcsMessage#LOCATION_NOT_SET} if it does not contain a location.
+     *
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public double getLatitude() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getLatitudeForMessage(mId, isIncoming()));
+    }
+
+    /**
+     * Sets the latitude for this message and persists in storage.
+     *
+     * @param latitude The latitude for this location message.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setLatitude(double latitude) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setLatitudeForMessage(mId, isIncoming(), latitude));
+    }
+
+    /**
+     * @return Returns the associated longitude for this message, or
+     * {@link RcsMessage#LOCATION_NOT_SET} if it does not contain a location.
+     *
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public double getLongitude() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getLongitudeForMessage(mId, isIncoming()));
+    }
+
+    /**
+     * Sets the longitude for this message and persists in storage.
+     *
+     * @param longitude The longitude for this location message.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setLongitude(double longitude) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.setLongitudeForMessage(mId, isIncoming(), longitude));
+    }
+
+    /**
+     * Attaches an {@link RcsFileTransferPart} to this message and persists into storage.
+     *
+     * @param fileTransferCreationParameters The parameters to be used to create the
+     *                                       {@link RcsFileTransferPart}
+     * @return A new instance of {@link RcsFileTransferPart}
+     * @throws RcsMessageStoreException if the file transfer could not be persisted into storage.
+     */
+    @NonNull
+    @WorkerThread
+    public RcsFileTransferPart insertFileTransfer(
+            RcsFileTransferCreationParameters fileTransferCreationParameters)
+            throws RcsMessageStoreException {
+        return new RcsFileTransferPart(RcsControllerCall.call(
+                iRcs -> iRcs.storeFileTransfer(mId, isIncoming(), fileTransferCreationParameters)));
+    }
+
+    /**
+     * @return Returns all the {@link RcsFileTransferPart}s associated with this message in an
+     * unmodifiable set.
+     * @throws RcsMessageStoreException if the file transfers could not be read from the storage
+     */
+    @NonNull
+    @WorkerThread
+    public Set<RcsFileTransferPart> getFileTransferParts() throws RcsMessageStoreException {
+        Set<RcsFileTransferPart> fileTransferParts = new HashSet<>();
+
+        int[] fileTransferIds = RcsControllerCall.call(
+                iRcs -> iRcs.getFileTransfersAttachedToMessage(mId, isIncoming()));
+
+        for (int fileTransfer : fileTransferIds) {
+            fileTransferParts.add(new RcsFileTransferPart(fileTransfer));
+        }
+
+        return Collections.unmodifiableSet(fileTransferParts);
+    }
+
+    /**
+     * Removes a {@link RcsFileTransferPart} from this message, and deletes it in storage.
+     *
+     * @param fileTransferPart The part to delete.
+     * @throws RcsMessageStoreException if the file transfer could not be removed from storage
+     */
+    @WorkerThread
+    public void removeFileTransferPart(@NonNull RcsFileTransferPart fileTransferPart)
+            throws RcsMessageStoreException {
+        if (fileTransferPart == null) {
+            return;
+        }
+
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.deleteFileTransfer(fileTransferPart.getId()));
+    }
+
+    /**
+     * @return Returns {@code true} if this message was received on this device, {@code false} if it
+     * was sent.
+     */
+    public abstract boolean isIncoming();
 }
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsMessageCreationParameters.aidl
similarity index 93%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsMessageCreationParameters.aidl
index 82d985d..5774d00 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsMessageCreationParameters.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsMessageCreationParameters;
diff --git a/telephony/java/android/telephony/ims/RcsMessageCreationParameters.java b/telephony/java/android/telephony/ims/RcsMessageCreationParameters.java
new file mode 100644
index 0000000..ff3f33e
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsMessageCreationParameters.java
@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import static android.telephony.ims.RcsMessage.LOCATION_NOT_SET;
+
+import android.annotation.CheckResult;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.telephony.SubscriptionInfo;
+
+/**
+ * The collection of parameters to be passed into
+ * {@link RcsThread#addIncomingMessage(RcsIncomingMessageCreationParameters)} and
+ * {@link RcsThread#addOutgoingMessage(RcsMessageCreationParameters)} to create and persist
+ * {@link RcsMessage}s on an {@link RcsThread}
+ *
+ * @hide TODO - make public
+ */
+public class RcsMessageCreationParameters implements Parcelable {
+    // The globally unique id of the RcsMessage to be created.
+    private final String mRcsMessageGlobalId;
+
+    // The subscription that this message was/will be received/sent from.
+    private final int mSubId;
+    // The sending/receiving status of the message
+    private final @RcsMessage.RcsMessageStatus int mMessageStatus;
+    // The timestamp of message creation
+    private final long mOriginationTimestamp;
+    // The user visible content of the message
+    private final String mText;
+    // The latitude of the message if this is a location message
+    private final double mLatitude;
+    // The longitude of the message if this is a location message
+    private final double mLongitude;
+
+    /**
+     * @return Returns the globally unique RCS Message ID for the {@link RcsMessage} to be created.
+     * Please see 4.4.5.2 - GSMA RCC.53 (RCS Device API 1.6 Specification
+     */
+    @Nullable
+    public String getRcsMessageGlobalId() {
+        return mRcsMessageGlobalId;
+    }
+
+    /**
+     * @return Returns the subscription ID that was used to send or receive the {@link RcsMessage}
+     * to be created.
+     */
+    public int getSubId() {
+        return mSubId;
+    }
+
+    /**
+     * @return Returns the status for the {@link RcsMessage} to be created.
+     * @see RcsMessage.RcsMessageStatus
+     */
+    public int getMessageStatus() {
+        return mMessageStatus;
+    }
+
+    /**
+     * @return Returns the origination timestamp of the {@link RcsMessage} to be created in
+     * milliseconds passed after midnight, January 1, 1970 UTC. Origination is defined as when
+     * the sender tapped the send button.
+     */
+    public long getOriginationTimestamp() {
+        return mOriginationTimestamp;
+    }
+
+    /**
+     * @return Returns the user visible text contained in the {@link RcsMessage} to be created
+     */
+    @Nullable
+    public String getText() {
+        return mText;
+    }
+
+    /**
+     * @return Returns the latitude of the {@link RcsMessage} to be created, or
+     * {@link RcsMessage#LOCATION_NOT_SET} if the message does not contain a location.
+     */
+    public double getLatitude() {
+        return mLatitude;
+    }
+
+    /**
+     * @return Returns the longitude of the {@link RcsMessage} to be created, or
+     * {@link RcsMessage#LOCATION_NOT_SET} if the message does not contain a location.
+     */
+    public double getLongitude() {
+        return mLongitude;
+    }
+
+    /**
+     * The base builder for creating {@link RcsMessage}s on {@link RcsThread}s.
+     *
+     * @see RcsIncomingMessageCreationParameters
+     */
+    public static class Builder {
+        private String mRcsMessageGlobalId;
+        private int mSubId;
+        private @RcsMessage.RcsMessageStatus int mMessageStatus;
+        private long mOriginationTimestamp;
+        private String mText;
+        private double mLatitude = LOCATION_NOT_SET;
+        private double mLongitude = LOCATION_NOT_SET;
+
+        /**
+         * Creates a new {@link Builder} to create an instance of
+         * {@link RcsMessageCreationParameters}.
+         *
+         * @param originationTimestamp The timestamp of {@link RcsMessage} creation. The origination
+         *                             timestamp value in milliseconds passed after midnight,
+         *                             January 1, 1970 UTC
+         * @param subscriptionId The subscription ID that was used to send or receive this
+         *                       {@link RcsMessage}
+         * @see SubscriptionInfo#getSubscriptionId()
+         */
+        public Builder(long originationTimestamp, int subscriptionId) {
+            mOriginationTimestamp = originationTimestamp;
+            mSubId = subscriptionId;
+        }
+
+        /**
+         * Sets the status of the {@link RcsMessage} to be built.
+         *
+         * @param rcsMessageStatus The status to be set
+         * @return The same instance of {@link Builder} to chain methods
+         * @see RcsMessage#setStatus(int)
+         */
+        @CheckResult
+        public Builder setStatus(@RcsMessage.RcsMessageStatus int rcsMessageStatus) {
+            mMessageStatus = rcsMessageStatus;
+            return this;
+        }
+
+        /**
+         * Sets the globally unique RCS message identifier for the {@link RcsMessage} to be built.
+         * This function does not confirm that this message id is unique. Please see 4.4.5.2 - GSMA
+         * RCC.53 (RCS Device API 1.6 Specification)
+         *
+         * @param rcsMessageId The ID to be set
+         * @return The same instance of {@link Builder} to chain methods
+         * @see RcsMessage#setRcsMessageId(String)
+         */
+        @CheckResult
+        public Builder setRcsMessageId(String rcsMessageId) {
+            mRcsMessageGlobalId = rcsMessageId;
+            return this;
+        }
+
+        /**
+         * Sets the text of the {@link RcsMessage} to be built.
+         *
+         * @param text The user visible text of the message
+         * @return The same instance of {@link Builder} to chain methods
+         * @see RcsMessage#setText(String)
+         */
+        @CheckResult
+        public Builder setText(String text) {
+            mText = text;
+            return this;
+        }
+
+        /**
+         * Sets the latitude of the {@link RcsMessage} to be built. Please see US5-24 - GSMA RCC.71
+         * (RCS Universal Profile Service Definition Document)
+         *
+         * @param latitude The latitude of the location information associated with this message.
+         * @return The same instance of {@link Builder} to chain methods
+         * @see RcsMessage#setLatitude(double)
+         */
+        @CheckResult
+        public Builder setLatitude(double latitude) {
+            mLatitude = latitude;
+            return this;
+        }
+
+        /**
+         * Sets the longitude of the {@link RcsMessage} to be built. Please see US5-24 - GSMA RCC.71
+         * (RCS Universal Profile Service Definition Document)
+         *
+         * @param longitude The longitude of the location information associated with this message.
+         * @return The same instance of {@link Builder} to chain methods
+         * @see RcsMessage#setLongitude(double)
+         */
+        @CheckResult
+        public Builder setLongitude(double longitude) {
+            mLongitude = longitude;
+            return this;
+        }
+
+        /**
+         * @hide
+         */
+        public RcsMessageCreationParameters build() {
+            return new RcsMessageCreationParameters(this);
+        }
+    }
+
+    protected RcsMessageCreationParameters(Builder builder) {
+        mRcsMessageGlobalId = builder.mRcsMessageGlobalId;
+        mSubId = builder.mSubId;
+        mMessageStatus = builder.mMessageStatus;
+        mOriginationTimestamp = builder.mOriginationTimestamp;
+        mText = builder.mText;
+        mLatitude = builder.mLatitude;
+        mLongitude = builder.mLongitude;
+    }
+
+    protected RcsMessageCreationParameters(Parcel in) {
+        mRcsMessageGlobalId = in.readString();
+        mSubId = in.readInt();
+        mMessageStatus = in.readInt();
+        mOriginationTimestamp = in.readLong();
+        mText = in.readString();
+        mLatitude = in.readDouble();
+        mLongitude = in.readDouble();
+    }
+
+    public static final Creator<RcsMessageCreationParameters> CREATOR =
+            new Creator<RcsMessageCreationParameters>() {
+                @Override
+                public RcsMessageCreationParameters createFromParcel(Parcel in) {
+                    return new RcsMessageCreationParameters(in);
+                }
+
+                @Override
+                public RcsMessageCreationParameters[] newArray(int size) {
+                    return new RcsMessageCreationParameters[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(mRcsMessageGlobalId);
+        dest.writeInt(mSubId);
+        dest.writeInt(mMessageStatus);
+        dest.writeLong(mOriginationTimestamp);
+        dest.writeString(mText);
+        dest.writeDouble(mLatitude);
+        dest.writeDouble(mLongitude);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsMessageQueryParameters.aidl
similarity index 94%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsMessageQueryParameters.aidl
index 82d985d..c325c23 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsMessageQueryParameters.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsMessageQueryParameters;
diff --git a/telephony/java/android/telephony/ims/RcsMessageQueryParameters.java b/telephony/java/android/telephony/ims/RcsMessageQueryParameters.java
new file mode 100644
index 0000000..c964cf9
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsMessageQueryParameters.java
@@ -0,0 +1,361 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import android.annotation.CheckResult;
+import android.annotation.IntDef;
+import android.annotation.IntRange;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.security.InvalidParameterException;
+
+/**
+ * The parameters to pass into
+ * {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)} in order to select a
+ * subset of {@link RcsMessage}s present in the message store.
+ *
+ * @hide TODO - make the Builder and builder() public. The rest should stay internal only.
+ */
+public class RcsMessageQueryParameters implements Parcelable {
+    /**
+     * @hide - not meant for public use
+     */
+    public static final int THREAD_ID_NOT_SET = -1;
+
+    /**
+     * Flag to be used with {@link Builder#setSortProperty(int)} to denote that the results should
+     * be sorted in the same order of {@link RcsMessage}s that got persisted into storage for faster
+     * results.
+     */
+    public static final int SORT_BY_CREATION_ORDER = 0;
+
+    /**
+     * Flag to be used with {@link Builder#setSortProperty(int)} to denote that the results should
+     * be sorted according to the timestamp of {@link RcsMessage#getOriginationTimestamp()}
+     */
+    public static final int SORT_BY_TIMESTAMP = 1;
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({SORT_BY_CREATION_ORDER, SORT_BY_TIMESTAMP})
+    public @interface SortingProperty {
+    }
+
+    /**
+     * Bitmask flag to be used with {@link Builder#setMessageType(int)} to make
+     * {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)} return
+     * {@link RcsIncomingMessage}s.
+     */
+    public static final int MESSAGE_TYPE_INCOMING = 0x0001;
+
+    /**
+     * Bitmask flag to be used with {@link Builder#setMessageType(int)} to make
+     * {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)} return
+     * {@link RcsOutgoingMessage}s.
+     */
+    public static final int MESSAGE_TYPE_OUTGOING = 0x0002;
+
+    /**
+     * Bitmask flag to be used with {@link Builder#setFileTransferPresence(int)} to make
+     * {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)} return {@link RcsMessage}s
+     * that have an {@link RcsFileTransferPart} attached.
+     */
+    public static final int MESSAGES_WITH_FILE_TRANSFERS = 0x0004;
+
+    /**
+     * Bitmask flag to be used with {@link Builder#setFileTransferPresence(int)} to make
+     * {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)} return {@link RcsMessage}s
+     * that don't have an {@link RcsFileTransferPart} attached.
+     */
+    public static final int MESSAGES_WITHOUT_FILE_TRANSFERS = 0x0008;
+
+    /**
+     * @hide - not meant for public use
+     */
+    public static final String MESSAGE_QUERY_PARAMETERS_KEY = "message_query_parameters";
+
+    // Whether the result should be filtered against incoming or outgoing messages
+    private int mMessageType;
+    // Whether the result should have file transfer messages attached or not
+    private int mFileTransferPresence;
+    // The SQL "Like" clause to filter messages
+    private String mMessageLike;
+    // The property the messages should be sorted against
+    private @SortingProperty int mSortingProperty;
+    // Whether the messages should be sorted in ascending order
+    private boolean mIsAscending;
+    // The number of results that should be returned with this query
+    private int mLimit;
+    // The thread that the results should be limited to
+    private int mThreadId;
+
+    RcsMessageQueryParameters(int messageType, int fileTransferPresence, String messageLike,
+            int threadId, @SortingProperty int sortingProperty, boolean isAscending, int limit) {
+        mMessageType = messageType;
+        mFileTransferPresence = fileTransferPresence;
+        mMessageLike = messageLike;
+        mSortingProperty = sortingProperty;
+        mIsAscending = isAscending;
+        mLimit = limit;
+        mThreadId = threadId;
+    }
+
+    /**
+     * @return Returns the type of {@link RcsMessage}s that this {@link RcsMessageQueryParameters}
+     * is set to query for.
+     */
+    public int getMessageType() {
+        return mMessageType;
+    }
+
+    /**
+     * @return Returns whether the result query should return {@link RcsMessage}s with
+     * {@link RcsFileTransferPart}s or not
+     */
+    public int getFileTransferPresence() {
+        return mFileTransferPresence;
+    }
+
+    /**
+     * @return Returns the SQL-inspired "LIKE" clause that will be used to match {@link RcsMessage}s
+     */
+    public String getMessageLike() {
+        return mMessageLike;
+    }
+
+    /**
+     * @return Returns the number of {@link RcsThread}s to be returned from the query. A value of
+     * 0 means there is no set limit.
+     */
+    public int getLimit() {
+        return mLimit;
+    }
+
+    /**
+     * @return Returns the property that will be used to sort the result against.
+     * @see SortingProperty
+     */
+    public @SortingProperty int getSortingProperty() {
+        return mSortingProperty;
+    }
+
+    /**
+     * @return Returns {@code true} if the result set will be sorted in ascending order,
+     * {@code false} if it will be sorted in descending order.
+     */
+    public boolean getSortDirection() {
+        return mIsAscending;
+    }
+
+    /**
+     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to get
+     * the thread that the result query should be limited to.
+     *
+     * As we do not expose any sort of integer ID's to public usage, this should be hidden.
+     *
+     * @hide - not meant for public use
+     */
+    public int getThreadId() {
+        return mThreadId;
+    }
+
+    /**
+     * A helper class to build the {@link RcsMessageQueryParameters}.
+     */
+    public static class Builder {
+        private @SortingProperty int mSortingProperty;
+        private int mMessageType;
+        private int mFileTransferPresence;
+        private String mMessageLike;
+        private boolean mIsAscending;
+        private int mLimit = 100;
+        private int mThreadId = THREAD_ID_NOT_SET;
+
+        /**
+         * Creates a new builder for {@link RcsMessageQueryParameters} to be used in
+         * {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)}
+         *
+         */
+        public Builder() {
+            // empty implementation
+        }
+
+        /**
+         * Desired number of threads to be returned from the query. Passing in 0 will return all
+         * existing threads at once. The limit defaults to 100.
+         *
+         * @param limit The number to limit the query result to.
+         * @return The same instance of the builder to chain parameters.
+         * @throws InvalidParameterException If the given limit is negative.
+         */
+        @CheckResult
+        public Builder setResultLimit(@IntRange(from = 0) int limit)
+                throws InvalidParameterException {
+            if (limit < 0) {
+                throw new InvalidParameterException("The query limit must be non-negative");
+            }
+
+            mLimit = limit;
+            return this;
+        }
+
+        /**
+         * Sets the type of messages to be returned from the query.
+         *
+         * @param messageType The type of message to be returned.
+         * @return The same instance of the builder to chain parameters.
+         * @see RcsMessageQueryParameters#MESSAGE_TYPE_INCOMING
+         * @see RcsMessageQueryParameters#MESSAGE_TYPE_OUTGOING
+         */
+        @CheckResult
+        public Builder setMessageType(int messageType) {
+            mMessageType = messageType;
+            return this;
+        }
+
+        /**
+         * Sets whether file transfer messages should be included in the query result or not.
+         *
+         * @param fileTransferPresence Whether file transfers should be included in the result
+         * @return The same instance of the builder to chain parameters.
+         * @see RcsMessageQueryParameters#MESSAGES_WITH_FILE_TRANSFERS
+         * @see RcsMessageQueryParameters#MESSAGES_WITHOUT_FILE_TRANSFERS
+         */
+        @CheckResult
+        public Builder setFileTransferPresence(int fileTransferPresence) {
+            mFileTransferPresence = fileTransferPresence;
+            return this;
+        }
+
+        /**
+         * Sets an SQL-inspired "like" clause to match with messages. Using a percent sign ('%')
+         * wildcard matches any sequence of zero or more characters. Using an underscore ('_')
+         * wildcard matches any single character. Not using any wildcards would only perform a
+         * string match. The input string is case-insensitive.
+         *
+         * The input "Wh%" would match messages "who", "where" and "what", while the input "Wh_"
+         * would only match "who"
+         *
+         * @param messageLike The "like" clause for matching {@link RcsMessage}s.
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setMessageLike(String messageLike) {
+            mMessageLike = messageLike;
+            return this;
+        }
+
+        /**
+         * Sets the property where the results should be sorted against. Defaults to
+         * {@link RcsMessageQueryParameters.SortingProperty#SORT_BY_CREATION_ORDER}
+         *
+         * @param sortingProperty against which property the results should be sorted
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setSortProperty(@SortingProperty int sortingProperty) {
+            mSortingProperty = sortingProperty;
+            return this;
+        }
+
+        /**
+         * Sets whether the results should be sorted ascending or descending
+         *
+         * @param isAscending whether the results should be sorted ascending
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setSortDirection(boolean isAscending) {
+            mIsAscending = isAscending;
+            return this;
+        }
+
+        /**
+         * Limits the results to the given thread.
+         *
+         * @param thread the {@link RcsThread} that results should be limited to. If set to
+         *               {@code null}, messages on all threads will be queried
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setThread(@Nullable RcsThread thread) {
+            if (thread == null) {
+                mThreadId = THREAD_ID_NOT_SET;
+            } else {
+                mThreadId = thread.getThreadId();
+            }
+            return this;
+        }
+
+        /**
+         * Builds the {@link RcsMessageQueryParameters} to use in
+         * {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)}
+         *
+         * @return An instance of {@link RcsMessageQueryParameters} to use with the message
+         * query.
+         */
+        public RcsMessageQueryParameters build() {
+            return new RcsMessageQueryParameters(mMessageType, mFileTransferPresence, mMessageLike,
+                    mThreadId, mSortingProperty, mIsAscending, mLimit);
+        }
+    }
+
+    /**
+     * Parcelable boilerplate below.
+     */
+    protected RcsMessageQueryParameters(Parcel in) {
+        mMessageType = in.readInt();
+        mFileTransferPresence = in.readInt();
+        mMessageLike = in.readString();
+        mSortingProperty = in.readInt();
+        mIsAscending = in.readBoolean();
+        mLimit = in.readInt();
+        mThreadId = in.readInt();
+    }
+
+    public static final Creator<RcsMessageQueryParameters> CREATOR =
+            new Creator<RcsMessageQueryParameters>() {
+                @Override
+                public RcsMessageQueryParameters createFromParcel(Parcel in) {
+                    return new RcsMessageQueryParameters(in);
+                }
+
+                @Override
+                public RcsMessageQueryParameters[] newArray(int size) {
+                    return new RcsMessageQueryParameters[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(mMessageType);
+        dest.writeInt(mFileTransferPresence);
+        dest.writeString(mMessageLike);
+        dest.writeInt(mSortingProperty);
+        dest.writeBoolean(mIsAscending);
+        dest.writeInt(mLimit);
+        dest.writeInt(mThreadId);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsMessageQueryResult.aidl
similarity index 94%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsMessageQueryResult.aidl
index 82d985d..a73ba50 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsMessageQueryResult.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsMessageQueryResult;
diff --git a/telephony/java/android/telephony/ims/RcsMessageQueryResult.java b/telephony/java/android/telephony/ims/RcsMessageQueryResult.java
new file mode 100644
index 0000000..c3846fd
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsMessageQueryResult.java
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import static android.provider.Telephony.RcsColumns.RcsUnifiedMessageColumns.MESSAGE_TYPE_INCOMING;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.ims.RcsTypeIdPair;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The result of a {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)}
+ * call. This class allows getting the token for querying the next batch of messages in order to
+ * prevent handling large amounts of data at once.
+ *
+ * @hide
+ */
+public class RcsMessageQueryResult implements Parcelable {
+    // The token to continue the query to get the next batch of results
+    private RcsQueryContinuationToken mContinuationToken;
+    // The message type and message ID pairs for all the messages in this query result
+    private List<RcsTypeIdPair> mMessageTypeIdPairs;
+
+    /**
+     * Internal constructor for {@link com.android.internal.telephony.ims.RcsMessageStoreController}
+     * to create query results
+     *
+     * @hide
+     */
+    public RcsMessageQueryResult(
+            RcsQueryContinuationToken continuationToken,
+            List<RcsTypeIdPair> messageTypeIdPairs) {
+        mContinuationToken = continuationToken;
+        mMessageTypeIdPairs = messageTypeIdPairs;
+    }
+
+    /**
+     * Returns a token to call
+     * {@link RcsMessageStore#getRcsMessages(RcsQueryContinuationToken)}
+     * to get the next batch of {@link RcsMessage}s.
+     */
+    @Nullable
+    public RcsQueryContinuationToken getContinuationToken() {
+        return mContinuationToken;
+    }
+
+    /**
+     * Returns all the {@link RcsMessage}s in the current query result. Call {@link
+     * RcsMessageStore#getRcsMessages(RcsQueryContinuationToken)} to get the next batch
+     * of {@link RcsMessage}s.
+     */
+    @NonNull
+    public List<RcsMessage> getMessages() {
+        List<RcsMessage> messages = new ArrayList<>();
+        for (RcsTypeIdPair typeIdPair : mMessageTypeIdPairs) {
+            if (typeIdPair.getType() == MESSAGE_TYPE_INCOMING) {
+                messages.add(new RcsIncomingMessage(typeIdPair.getId()));
+            } else {
+                messages.add(new RcsOutgoingMessage(typeIdPair.getId()));
+            }
+        }
+
+        return messages;
+    }
+
+    protected RcsMessageQueryResult(Parcel in) {
+        mContinuationToken = in.readParcelable(
+                RcsQueryContinuationToken.class.getClassLoader());
+        in.readTypedList(mMessageTypeIdPairs, RcsTypeIdPair.CREATOR);
+    }
+
+    public static final Creator<RcsMessageQueryResult> CREATOR =
+            new Creator<RcsMessageQueryResult>() {
+                @Override
+                public RcsMessageQueryResult createFromParcel(Parcel in) {
+                    return new RcsMessageQueryResult(in);
+                }
+
+                @Override
+                public RcsMessageQueryResult[] newArray(int size) {
+                    return new RcsMessageQueryResult[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeParcelable(mContinuationToken, flags);
+        dest.writeTypedList(mMessageTypeIdPairs);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/Rcs1To1Thread.aidl b/telephony/java/android/telephony/ims/RcsMessageSnippet.aidl
similarity index 95%
rename from telephony/java/android/telephony/ims/Rcs1To1Thread.aidl
rename to telephony/java/android/telephony/ims/RcsMessageSnippet.aidl
index 9fdc41d..99b8eb7 100644
--- a/telephony/java/android/telephony/ims/Rcs1To1Thread.aidl
+++ b/telephony/java/android/telephony/ims/RcsMessageSnippet.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable Rcs1To1Thread;
+parcelable RcsMessageSnippet;
diff --git a/telephony/java/android/telephony/ims/RcsMessageSnippet.java b/telephony/java/android/telephony/ims/RcsMessageSnippet.java
new file mode 100644
index 0000000..9399c20
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsMessageSnippet.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.telephony.ims.RcsMessage.RcsMessageStatus;
+
+/**
+ * An immutable summary of the latest {@link RcsMessage} on an {@link RcsThread}
+ *
+ * @hide TODO: make public
+ */
+public class RcsMessageSnippet implements Parcelable {
+    private final String mText;
+    private final @RcsMessageStatus int mStatus;
+    private final long mTimestamp;
+
+    /**
+     * @hide
+     */
+    public RcsMessageSnippet(String text, @RcsMessageStatus int status, long timestamp) {
+        mText = text;
+        mStatus = status;
+        mTimestamp = timestamp;
+    }
+
+    /**
+     * @return Returns the text of the {@link RcsMessage} with highest origination timestamp value
+     * (i.e. latest) in this thread
+     */
+    @Nullable
+    public String getSnippetText() {
+        return mText;
+    }
+
+    /**
+     * @return Returns the status of the {@link RcsMessage} with highest origination timestamp value
+     * (i.e. latest) in this thread
+     */
+    public @RcsMessageStatus int getSnippetStatus() {
+        return mStatus;
+    }
+
+    /**
+     * @return Returns the timestamp of the {@link RcsMessage} with highest origination timestamp
+     * value (i.e. latest) in this thread
+     */
+    public long getSnippetTimestamp() {
+        return mTimestamp;
+    }
+
+    protected RcsMessageSnippet(Parcel in) {
+        mText = in.readString();
+        mStatus = in.readInt();
+        mTimestamp = in.readLong();
+    }
+
+    public static final Creator<RcsMessageSnippet> CREATOR =
+            new Creator<RcsMessageSnippet>() {
+                @Override
+                public RcsMessageSnippet createFromParcel(Parcel in) {
+                    return new RcsMessageSnippet(in);
+                }
+
+                @Override
+                public RcsMessageSnippet[] newArray(int size) {
+                    return new RcsMessageSnippet[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(mText);
+        dest.writeInt(mStatus);
+        dest.writeLong(mTimestamp);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsMessageStore.java b/telephony/java/android/telephony/ims/RcsMessageStore.java
index 1bf6ffd..c8c36a8 100644
--- a/telephony/java/android/telephony/ims/RcsMessageStore.java
+++ b/telephony/java/android/telephony/ims/RcsMessageStore.java
@@ -16,106 +16,223 @@
 
 package android.telephony.ims;
 
+import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.WorkerThread;
-import android.os.RemoteException;
-import android.os.ServiceManager;
-import android.telephony.Rlog;
-import android.telephony.ims.aidl.IRcs;
+import android.net.Uri;
+
+import java.util.List;
 
 /**
  * RcsMessageStore is the application interface to RcsProvider and provides access methods to
  * RCS related database tables.
+ *
  * @hide - TODO make this public
  */
 public class RcsMessageStore {
-    static final String TAG = "RcsMessageStore";
-
     /**
      * Returns the first chunk of existing {@link RcsThread}s in the common storage.
+     *
      * @param queryParameters Parameters to specify to return a subset of all RcsThreads.
      *                        Passing a value of null will return all threads.
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
      */
     @WorkerThread
-    public RcsThreadQueryResult getRcsThreads(@Nullable RcsThreadQueryParameters queryParameters) {
-        try {
-            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
-            if (iRcs != null) {
-                return iRcs.getRcsThreads(queryParameters);
-            }
-        } catch (RemoteException re) {
-            Rlog.e(TAG, "RcsMessageStore: Exception happened during getRcsThreads", re);
-        }
-
-        return null;
+    @NonNull
+    public RcsThreadQueryResult getRcsThreads(@Nullable RcsThreadQueryParameters queryParameters)
+            throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getRcsThreads(queryParameters));
     }
 
     /**
      * Returns the next chunk of {@link RcsThread}s in the common storage.
+     *
      * @param continuationToken A token to continue the query to get the next chunk. This is
-     *                          obtained through {@link RcsThreadQueryResult#nextChunkToken}.
+     *                          obtained through {@link RcsThreadQueryResult#getContinuationToken}.
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
      */
     @WorkerThread
-    public RcsThreadQueryResult getRcsThreads(RcsThreadQueryContinuationToken continuationToken) {
-        try {
-            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
-            if (iRcs != null) {
-                return iRcs.getRcsThreadsWithToken(continuationToken);
-            }
-        } catch (RemoteException re) {
-            Rlog.e(TAG, "RcsMessageStore: Exception happened during getRcsThreads", re);
-        }
+    @NonNull
+    public RcsThreadQueryResult getRcsThreads(@NonNull RcsQueryContinuationToken continuationToken)
+            throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getRcsThreadsWithToken(continuationToken));
+    }
 
-        return null;
+    /**
+     * Returns the first chunk of existing {@link RcsParticipant}s in the common storage.
+     *
+     * @param queryParameters Parameters to specify to return a subset of all RcsParticipants.
+     *                        Passing a value of null will return all participants.
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
+     */
+    @WorkerThread
+    @NonNull
+    public RcsParticipantQueryResult getRcsParticipants(
+            @Nullable RcsParticipantQueryParameters queryParameters)
+            throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getParticipants(queryParameters));
+    }
+
+    /**
+     * Returns the next chunk of {@link RcsParticipant}s in the common storage.
+     *
+     * @param continuationToken A token to continue the query to get the next chunk. This is
+     *                          obtained through
+     *                          {@link RcsParticipantQueryResult#getContinuationToken}
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
+     */
+    @WorkerThread
+    @NonNull
+    public RcsParticipantQueryResult getRcsParticipants(
+            @NonNull RcsQueryContinuationToken continuationToken)
+            throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getParticipantsWithToken(continuationToken));
+    }
+
+    /**
+     * Returns the first chunk of existing {@link RcsMessage}s in the common storage.
+     *
+     * @param queryParameters Parameters to specify to return a subset of all RcsMessages.
+     *                        Passing a value of null will return all messages.
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
+     */
+    @WorkerThread
+    @NonNull
+    public RcsMessageQueryResult getRcsMessages(
+            @Nullable RcsMessageQueryParameters queryParameters) throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getMessages(queryParameters));
+    }
+
+    /**
+     * Returns the next chunk of {@link RcsMessage}s in the common storage.
+     *
+     * @param continuationToken A token to continue the query to get the next chunk. This is
+     *                          obtained through {@link RcsMessageQueryResult#getContinuationToken}
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
+     */
+    @WorkerThread
+    @NonNull
+    public RcsMessageQueryResult getRcsMessages(
+            @NonNull RcsQueryContinuationToken continuationToken) throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getMessagesWithToken(continuationToken));
+    }
+
+    /**
+     * Returns the first chunk of existing {@link RcsEvent}s in the common storage.
+     *
+     * @param queryParameters Parameters to specify to return a subset of all RcsEvents.
+     *                        Passing a value of null will return all events.
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
+     */
+    @WorkerThread
+    @NonNull
+    public RcsEventQueryResult getRcsEvents(
+            @Nullable RcsEventQueryParameters queryParameters) throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getEvents(queryParameters));
+    }
+
+    /**
+     * Returns the next chunk of {@link RcsEvent}s in the common storage.
+     *
+     * @param continuationToken A token to continue the query to get the next chunk. This is
+     *                          obtained through {@link RcsEventQueryResult#getContinuationToken}.
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
+     */
+    @WorkerThread
+    @NonNull
+    public RcsEventQueryResult getRcsEvents(
+            @NonNull RcsQueryContinuationToken continuationToken) throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getEventsWithToken(continuationToken));
+    }
+
+    /**
+     * Persists an {@link RcsEvent} to common storage.
+     *
+     * @param persistableEvent The {@link RcsEvent} to persist into storage.
+     * @throws RcsMessageStoreException if the query could not be completed on the storage
+     *
+     * @see RcsGroupThreadNameChangedEvent
+     * @see RcsGroupThreadIconChangedEvent
+     * @see RcsGroupThreadParticipantJoinedEvent
+     * @see RcsGroupThreadParticipantLeftEvent
+     * @see RcsParticipantAliasChangedEvent
+     */
+    @WorkerThread
+    @NonNull
+    public void persistRcsEvent(RcsEvent persistableEvent) throws RcsMessageStoreException {
+        persistableEvent.persist();
     }
 
     /**
      * Creates a new 1 to 1 thread with the given participant and persists it in the storage.
+     *
+     * @param recipient The {@link RcsParticipant} that will receive the messages in this thread.
+     * @return The newly created {@link Rcs1To1Thread}
+     * @throws RcsMessageStoreException if the thread could not be persisted in the storage
      */
     @WorkerThread
-    public Rcs1To1Thread createRcs1To1Thread(RcsParticipant recipient) {
-        try {
-            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
-            if (iRcs != null) {
-                return iRcs.createRcs1To1Thread(recipient);
-            }
-        } catch (RemoteException re) {
-            Rlog.e(TAG, "RcsMessageStore: Exception happened during createRcs1To1Thread", re);
-        }
-
-        return null;
+    @NonNull
+    public Rcs1To1Thread createRcs1To1Thread(@NonNull RcsParticipant recipient)
+            throws RcsMessageStoreException {
+        return new Rcs1To1Thread(
+                RcsControllerCall.call(iRcs -> iRcs.createRcs1To1Thread(recipient.getId())));
     }
 
     /**
-     * Delete the {@link RcsThread} identified by the given threadId.
-     * @param threadId threadId of the thread to be deleted.
+     * Creates a new group thread with the given participants and persists it in the storage.
+     *
+     * @throws RcsMessageStoreException if the thread could not be persisted in the storage
      */
     @WorkerThread
-    public void deleteThread(int threadId) {
-        try {
-            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
-            if (iRcs != null) {
-                iRcs.deleteThread(threadId);
+    @NonNull
+    public RcsGroupThread createGroupThread(@Nullable List<RcsParticipant> recipients,
+            @Nullable String groupName, @Nullable Uri groupIcon) throws RcsMessageStoreException {
+        int[] recipientIds = null;
+        if (recipients != null) {
+            recipientIds = new int[recipients.size()];
+
+            for (int i = 0; i < recipients.size(); i++) {
+                recipientIds[i] = recipients.get(i).getId();
             }
-        } catch (RemoteException re) {
-            Rlog.e(TAG, "RcsMessageStore: Exception happened during deleteThread", re);
+        }
+
+        int[] finalRecipientIds = recipientIds;
+        return new RcsGroupThread(RcsControllerCall.call(
+                iRcs -> iRcs.createGroupThread(finalRecipientIds, groupName, groupIcon)));
+    }
+
+    /**
+     * Delete the given {@link RcsThread} from the storage.
+     *
+     * @param thread The thread to be deleted.
+     * @throws RcsMessageStoreException if the thread could not be deleted from the storage
+     */
+    @WorkerThread
+    public void deleteThread(@NonNull RcsThread thread) throws RcsMessageStoreException {
+        if (thread == null) {
+            return;
+        }
+
+        boolean isDeleteSucceeded = RcsControllerCall.call(
+                iRcs -> iRcs.deleteThread(thread.getThreadId(), thread.getThreadType()));
+
+        if (!isDeleteSucceeded) {
+            throw new RcsMessageStoreException("Could not delete RcsThread");
         }
     }
 
     /**
      * Creates a new participant and persists it in the storage.
+     *
      * @param canonicalAddress The defining address (e.g. phone number) of the participant.
+     * @param alias            The RCS alias for the participant.
+     * @throws RcsMessageStoreException if the participant could not be created on the storage
      */
-    public RcsParticipant createRcsParticipant(String canonicalAddress) {
-        try {
-            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
-            if (iRcs != null) {
-                return iRcs.createRcsParticipant(canonicalAddress);
-            }
-        } catch (RemoteException re) {
-            Rlog.e(TAG, "RcsMessageStore: Exception happened during createRcsParticipant", re);
-        }
-
-        return null;
+    @WorkerThread
+    @NonNull
+    public RcsParticipant createRcsParticipant(String canonicalAddress, @Nullable String alias)
+            throws RcsMessageStoreException {
+        return new RcsParticipant(
+                RcsControllerCall.call(iRcs -> iRcs.createRcsParticipant(canonicalAddress, alias)));
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsMessageStoreException.java b/telephony/java/android/telephony/ims/RcsMessageStoreException.java
new file mode 100644
index 0000000..e158f1a
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsMessageStoreException.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+/**
+ * An exception that happened on {@link RcsMessageStore} or one of the derived storage classes in
+ * {@link android.telephony.ims}
+ *
+ * @hide TODO: make public
+ */
+public class RcsMessageStoreException extends Exception {
+
+    /**
+     * Constructs an {@link RcsMessageStoreException} with the specified detail message.
+     * @param message The detail message
+     * @see Throwable#getMessage()
+     */
+    public RcsMessageStoreException(String message) {
+        super(message);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsMultiMediaPart.java b/telephony/java/android/telephony/ims/RcsMultiMediaPart.java
deleted file mode 100644
index d295fba..0000000
--- a/telephony/java/android/telephony/ims/RcsMultiMediaPart.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcel;
-
-/**
- * A part of a composite {@link RcsMessage} that holds a media that is rendered on the screen
- * (i.e. image, video etc)
- * @hide - TODO(sahinc) make this public
- */
-public class RcsMultiMediaPart extends RcsFileTransferPart {
-    public static final Creator<RcsMultiMediaPart> CREATOR = new Creator<RcsMultiMediaPart>() {
-        @Override
-        public RcsMultiMediaPart createFromParcel(Parcel in) {
-            return new RcsMultiMediaPart(in);
-        }
-
-        @Override
-        public RcsMultiMediaPart[] newArray(int size) {
-            return new RcsMultiMediaPart[size];
-        }
-    };
-
-    protected RcsMultiMediaPart(Parcel in) {
-        super(in);
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-    }
-}
diff --git a/telephony/java/android/telephony/ims/RcsMultimediaPart.aidl b/telephony/java/android/telephony/ims/RcsMultimediaPart.aidl
deleted file mode 100644
index 5992d95..0000000
--- a/telephony/java/android/telephony/ims/RcsMultimediaPart.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsMultimediaPart;
diff --git a/telephony/java/android/telephony/ims/RcsOutgoingMessage.aidl b/telephony/java/android/telephony/ims/RcsOutgoingMessage.aidl
deleted file mode 100644
index 6e0c80f..0000000
--- a/telephony/java/android/telephony/ims/RcsOutgoingMessage.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsOutgoingMessage;
diff --git a/telephony/java/android/telephony/ims/RcsOutgoingMessage.java b/telephony/java/android/telephony/ims/RcsOutgoingMessage.java
index bfb1611..0bd55ec 100644
--- a/telephony/java/android/telephony/ims/RcsOutgoingMessage.java
+++ b/telephony/java/android/telephony/ims/RcsOutgoingMessage.java
@@ -15,34 +15,53 @@
  */
 package android.telephony.ims;
 
-import android.os.Parcel;
+import android.annotation.NonNull;
+import android.annotation.WorkerThread;
+
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * This is a single instance of a message sent over RCS.
- * @hide - TODO(sahinc) make this public
+ *
+ * @hide - TODO(109759350) make this public
  */
 public class RcsOutgoingMessage extends RcsMessage {
-    public static final Creator<RcsOutgoingMessage> CREATOR = new Creator<RcsOutgoingMessage>() {
-        @Override
-        public RcsOutgoingMessage createFromParcel(Parcel in) {
-            return new RcsOutgoingMessage(in);
-        }
-
-        @Override
-        public RcsOutgoingMessage[] newArray(int size) {
-            return new RcsOutgoingMessage[size];
-        }
-    };
-
-    protected RcsOutgoingMessage(Parcel in) {
+    RcsOutgoingMessage(int id) {
+        super(id);
     }
 
-    @Override
-    public int describeContents() {
-        return 0;
+    /**
+     * @return Returns the {@link RcsOutgoingMessageDelivery}s associated with this message. Please
+     * note that the deliveries returned for the {@link RcsOutgoingMessage} may not always match the
+     * {@link RcsParticipant}s on the {@link RcsGroupThread} as the group recipients may have
+     * changed.
+     * @throws RcsMessageStoreException if the outgoing deliveries could not be read from storage.
+     */
+    @NonNull
+    @WorkerThread
+    public List<RcsOutgoingMessageDelivery> getOutgoingDeliveries()
+            throws RcsMessageStoreException {
+        int[] deliveryParticipants;
+        List<RcsOutgoingMessageDelivery> messageDeliveries = new ArrayList<>();
+
+        deliveryParticipants = RcsControllerCall.call(
+                iRcs -> iRcs.getMessageRecipients(mId));
+
+        if (deliveryParticipants != null) {
+            for (Integer deliveryParticipant : deliveryParticipants) {
+                messageDeliveries.add(new RcsOutgoingMessageDelivery(deliveryParticipant, mId));
+            }
+        }
+
+        return messageDeliveries;
     }
 
+    /**
+     * @return Returns {@code false} as this is not an incoming message.
+     */
     @Override
-    public void writeToParcel(Parcel dest, int flags) {
+    public boolean isIncoming() {
+        return false;
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsOutgoingMessageDelivery.java b/telephony/java/android/telephony/ims/RcsOutgoingMessageDelivery.java
new file mode 100644
index 0000000..b93f892
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsOutgoingMessageDelivery.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.telephony.ims;
+
+import android.annotation.NonNull;
+import android.annotation.WorkerThread;
+
+/**
+ * This class holds the delivery information of an {@link RcsOutgoingMessage} for each
+ * {@link RcsParticipant} that the message was intended for.
+ *
+ * @hide - TODO(109759350) make this public
+ */
+public class RcsOutgoingMessageDelivery {
+    // The participant that this delivery is intended for
+    private final int mRecipientId;
+    // The message this delivery is associated with
+    private final int mRcsOutgoingMessageId;
+
+    /**
+     * Constructor to be used with RcsOutgoingMessage.getDelivery()
+     *
+     * @hide
+     */
+    RcsOutgoingMessageDelivery(int recipientId, int messageId) {
+        mRecipientId = recipientId;
+        mRcsOutgoingMessageId = messageId;
+    }
+
+    /**
+     * Sets the delivery time of this outgoing delivery and persists into storage.
+     *
+     * @param deliveredTimestamp The timestamp to set to delivery. It is defined as milliseconds
+     *                           passed after midnight, January 1, 1970 UTC
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setDeliveredTimestamp(long deliveredTimestamp) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setOutgoingDeliveryDeliveredTimestamp(
+                mRcsOutgoingMessageId, mRecipientId, deliveredTimestamp));
+    }
+
+    /**
+     * @return Returns the delivered timestamp of the associated message to the associated
+     * participant. Timestamp is defined as milliseconds passed after midnight, January 1, 1970 UTC.
+     * Returns 0 if the {@link RcsOutgoingMessage} is not delivered yet.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getDeliveredTimestamp() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getOutgoingDeliveryDeliveredTimestamp(
+                mRcsOutgoingMessageId, mRecipientId));
+    }
+
+    /**
+     * Sets the seen time of this outgoing delivery and persists into storage.
+     *
+     * @param seenTimestamp The timestamp to set to delivery. It is defined as milliseconds
+     *                      passed after midnight, January 1, 1970 UTC
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setSeenTimestamp(long seenTimestamp) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setOutgoingDeliverySeenTimestamp(
+                mRcsOutgoingMessageId, mRecipientId, seenTimestamp));
+    }
+
+    /**
+     * @return Returns the seen timestamp of the associated message by the associated
+     * participant. Timestamp is defined as milliseconds passed after midnight, January 1, 1970 UTC.
+     * Returns 0 if the {@link RcsOutgoingMessage} is not seen yet.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public long getSeenTimestamp() throws RcsMessageStoreException {
+        return RcsControllerCall.call(
+                iRcs -> iRcs.getOutgoingDeliverySeenTimestamp(mRcsOutgoingMessageId, mRecipientId));
+    }
+
+    /**
+     * Sets the status of this outgoing delivery and persists into storage.
+     *
+     * @param status The status of the associated {@link RcsMessage}s delivery to the associated
+     *               {@link RcsParticipant}
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
+     */
+    @WorkerThread
+    public void setStatus(@RcsMessage.RcsMessageStatus int status) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setOutgoingDeliveryStatus(
+                mRcsOutgoingMessageId, mRecipientId, status));
+    }
+
+    /**
+     * @return Returns the status of this outgoing delivery.
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @WorkerThread
+    public @RcsMessage.RcsMessageStatus int getStatus() throws RcsMessageStoreException {
+        return RcsControllerCall.call(
+                iRcs -> iRcs.getOutgoingDeliveryStatus(mRcsOutgoingMessageId, mRecipientId));
+    }
+
+    /**
+     * @return Returns the recipient associated with this delivery.
+     */
+    @NonNull
+    public RcsParticipant getRecipient() {
+        return new RcsParticipant(mRecipientId);
+    }
+
+    /**
+     * @return Returns the {@link RcsOutgoingMessage} associated with this delivery.
+     */
+    @NonNull
+    public RcsOutgoingMessage getMessage() {
+        return new RcsOutgoingMessage(mRcsOutgoingMessageId);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsParticipant.aidl b/telephony/java/android/telephony/ims/RcsParticipant.aidl
deleted file mode 100644
index 1c44363..0000000
--- a/telephony/java/android/telephony/ims/RcsParticipant.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsParticipant;
diff --git a/telephony/java/android/telephony/ims/RcsParticipant.java b/telephony/java/android/telephony/ims/RcsParticipant.java
index f678ec7e..ce0ad2c 100644
--- a/telephony/java/android/telephony/ims/RcsParticipant.java
+++ b/telephony/java/android/telephony/ims/RcsParticipant.java
@@ -15,33 +15,17 @@
  */
 package android.telephony.ims;
 
-import static android.telephony.ims.RcsMessageStore.TAG;
-
-import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.WorkerThread;
-import android.os.Parcel;
-import android.os.Parcelable;
-import android.os.RemoteException;
-import android.os.ServiceManager;
-import android.telephony.Rlog;
-import android.telephony.ims.aidl.IRcs;
-import android.text.TextUtils;
-
-import com.android.internal.util.Preconditions;
 
 /**
  * RcsParticipant is an RCS capable contact that can participate in {@link RcsThread}s.
- * @hide - TODO(sahinc) make this public
+ *
+ * @hide - TODO(109759350) make this public
  */
-public class RcsParticipant implements Parcelable {
+public class RcsParticipant {
     // The row ID of this participant in the database
     private int mId;
-    // The phone number of this participant
-    private String mCanonicalAddress;
-    // The RCS alias of this participant. This is different than the name of the contact in the
-    // Contacts app - i.e. RCS protocol allows users to define aliases for themselves that doesn't
-    // require other users to add them as contacts and give them a name.
-    private String mAlias;
 
     /**
      * Constructor for {@link com.android.internal.telephony.ims.RcsMessageStoreController}
@@ -49,68 +33,87 @@
      *
      * @hide
      */
-    public RcsParticipant(int id, @NonNull String canonicalAddress) {
+    public RcsParticipant(int id) {
         mId = id;
-        mCanonicalAddress = canonicalAddress;
     }
 
     /**
-     * @return Returns the canonical address (i.e. normalized phone number) for this participant
+     * @return Returns the canonical address (i.e. normalized phone number) for this
+     * {@link RcsParticipant}
+     * @throws RcsMessageStoreException if the value could not be read from the storage
      */
-    public String getCanonicalAddress() {
-        return mCanonicalAddress;
+    @Nullable
+    @WorkerThread
+    public String getCanonicalAddress() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getRcsParticipantCanonicalAddress(mId));
     }
 
     /**
-     * Sets the canonical address for this participant and updates it in storage.
-     * @param canonicalAddress the canonical address to update to.
+     * @return Returns the alias for this {@link RcsParticipant}. Alias is usually the real name of
+     * the person themselves. Please see US5-15 - GSMA RCC.71 (RCS Universal Profile Service
+     * Definition Document)
+     * @throws RcsMessageStoreException if the value could not be read from the storage
+     */
+    @Nullable
+    @WorkerThread
+    public String getAlias() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getRcsParticipantAlias(mId));
+    }
+
+    /**
+     * Sets the alias for this {@link RcsParticipant} and persists it in storage. Alias is usually
+     * the real name of the person themselves. Please see US5-15 - GSMA RCC.71 (RCS Universal
+     * Profile Service Definition Document)
+     *
+     * @param alias The alias to set to.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
      */
     @WorkerThread
-    public void setCanonicalAddress(@NonNull String canonicalAddress) {
-        Preconditions.checkNotNull(canonicalAddress);
-        if (canonicalAddress.equals(mCanonicalAddress)) {
-            return;
-        }
-
-        mCanonicalAddress = canonicalAddress;
-
-        try {
-            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
-            if (iRcs != null) {
-                iRcs.updateRcsParticipantCanonicalAddress(mId, mCanonicalAddress);
-            }
-        } catch (RemoteException re) {
-            Rlog.e(TAG, "RcsParticipant: Exception happened during setCanonicalAddress", re);
-        }
+    public void setAlias(String alias) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setRcsParticipantAlias(mId, alias));
     }
 
     /**
-     * @return Returns the alias for this participant. Alias is usually the real name of the person
-     * themselves.
+     * @return Returns the contact ID for this {@link RcsParticipant}. Contact ID is a unique ID for
+     * an {@link RcsParticipant} that is RCS provisioned. Please see 4.4.5 - GSMA RCC.53 (RCS Device
+     * API 1.6 Specification)
+     * @throws RcsMessageStoreException if the value could not be read from the storage
      */
-    public String getAlias() {
-        return mAlias;
+    @Nullable
+    @WorkerThread
+    public String getContactId() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getRcsParticipantContactId(mId));
     }
 
     /**
-     * Sets the alias for this participant and persists it in storage. Alias is usually the real
-     * name of the person themselves.
+     * Sets the contact ID for this {@link RcsParticipant}. Contact ID is a unique ID for
+     * an {@link RcsParticipant} that is RCS provisioned. Please see 4.4.5 - GSMA RCC.53 (RCS Device
+     * API 1.6 Specification)
+     *
+     * @param contactId The contact ID to set to.
+     * @throws RcsMessageStoreException if the value could not be persisted into storage
      */
     @WorkerThread
-    public void setAlias(String alias) {
-        if (TextUtils.equals(mAlias, alias)) {
-            return;
-        }
-        mAlias = alias;
+    public void setContactId(String contactId) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(iRcs -> iRcs.setRcsParticipantContactId(mId, contactId));
+    }
 
-        try {
-            IRcs iRcs = IRcs.Stub.asInterface(ServiceManager.getService("ircs"));
-            if (iRcs != null) {
-                iRcs.updateRcsParticipantAlias(mId, mAlias);
-            }
-        } catch (RemoteException re) {
-            Rlog.e(TAG, "RcsParticipant: Exception happened during setCanonicalAddress", re);
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
         }
+        if (!(obj instanceof RcsParticipant)) {
+            return false;
+        }
+        RcsParticipant other = (RcsParticipant) obj;
+
+        return mId == other.mId;
+    }
+
+    @Override
+    public int hashCode() {
+        return mId;
     }
 
     /**
@@ -121,34 +124,4 @@
     public int getId() {
         return mId;
     }
-
-    public static final Creator<RcsParticipant> CREATOR = new Creator<RcsParticipant>() {
-        @Override
-        public RcsParticipant createFromParcel(Parcel in) {
-            return new RcsParticipant(in);
-        }
-
-        @Override
-        public RcsParticipant[] newArray(int size) {
-            return new RcsParticipant[size];
-        }
-    };
-
-    protected RcsParticipant(Parcel in) {
-        mId = in.readInt();
-        mCanonicalAddress = in.readString();
-        mAlias = in.readString();
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeInt(mId);
-        dest.writeString(mCanonicalAddress);
-        dest.writeString(mAlias);
-    }
 }
diff --git a/telephony/java/android/telephony/ims/RcsParticipantAliasChangedEvent.java b/telephony/java/android/telephony/ims/RcsParticipantAliasChangedEvent.java
index b9ca5a8..04cdf86 100644
--- a/telephony/java/android/telephony/ims/RcsParticipantAliasChangedEvent.java
+++ b/telephony/java/android/telephony/ims/RcsParticipantAliasChangedEvent.java
@@ -15,27 +15,93 @@
  */
 package android.telephony.ims;
 
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.os.Parcel;
 
 /**
- * An event that indicates an {@link RcsParticipant}'s alias was changed.
- * @hide - TODO(sahinc) make this public
+ * An event that indicates an {@link RcsParticipant}'s alias was changed. Please see US18-2 - GSMA
+ * RCC.71 (RCS Universal Profile Service Definition Document)
+ *
+ * @hide - TODO(109759350) make this public
  */
-public class RcsParticipantAliasChangedEvent extends RcsParticipantEvent {
+public class RcsParticipantAliasChangedEvent extends RcsEvent {
+    // The ID of the participant that changed their alias
+    private int mParticipantId;
+    // The new alias of the above participant
+    private String mNewAlias;
+
+    /**
+     * Creates a new {@link RcsParticipantAliasChangedEvent}. This event is not persisted into
+     * storage until {@link RcsMessageStore#persistRcsEvent(RcsEvent)} is called.
+     *
+     * @param timestamp The timestamp of when this event happened, in milliseconds passed after
+     *                  midnight, January 1st, 1970 UTC
+     * @param participant The {@link RcsParticipant} that got their alias changed
+     * @param newAlias The new alias the {@link RcsParticipant} has.
+     * @see RcsMessageStore#persistRcsEvent(RcsEvent)
+     */
+    public RcsParticipantAliasChangedEvent(long timestamp, @NonNull RcsParticipant participant,
+            @Nullable String newAlias) {
+        super(timestamp);
+        mParticipantId = participant.getId();
+        mNewAlias = newAlias;
+    }
+
+    /**
+     * @hide - internal constructor for queries
+     */
+    public RcsParticipantAliasChangedEvent(long timestamp, int participantId,
+            @Nullable String newAlias) {
+        super(timestamp);
+        mParticipantId = participantId;
+        mNewAlias = newAlias;
+    }
+
+    /**
+     * @return Returns the {@link RcsParticipant} whose alias was changed.
+     */
+    @NonNull
+    public RcsParticipant getParticipantId() {
+        return new RcsParticipant(mParticipantId);
+    }
+
+    /**
+     * @return Returns the alias of the associated {@link RcsParticipant} after this event happened
+     */
+    @Nullable
+    public String getNewAlias() {
+        return mNewAlias;
+    }
+
+    /**
+     * Persists the event to the data store.
+     *
+     * @hide - not meant for public use.
+     */
+    @Override
+    public void persist() throws RcsMessageStoreException {
+        RcsControllerCall.call(iRcs -> iRcs.createParticipantAliasChangedEvent(
+                getTimestamp(), getParticipantId().getId(), getNewAlias()));
+    }
+
     public static final Creator<RcsParticipantAliasChangedEvent> CREATOR =
             new Creator<RcsParticipantAliasChangedEvent>() {
-        @Override
-        public RcsParticipantAliasChangedEvent createFromParcel(Parcel in) {
-            return new RcsParticipantAliasChangedEvent(in);
-        }
+                @Override
+                public RcsParticipantAliasChangedEvent createFromParcel(Parcel in) {
+                    return new RcsParticipantAliasChangedEvent(in);
+                }
 
-        @Override
-        public RcsParticipantAliasChangedEvent[] newArray(int size) {
-            return new RcsParticipantAliasChangedEvent[size];
-        }
-    };
+                @Override
+                public RcsParticipantAliasChangedEvent[] newArray(int size) {
+                    return new RcsParticipantAliasChangedEvent[size];
+                }
+            };
 
     protected RcsParticipantAliasChangedEvent(Parcel in) {
+        super(in);
+        mNewAlias = in.readString();
+        mParticipantId = in.readInt();
     }
 
     @Override
@@ -45,5 +111,8 @@
 
     @Override
     public void writeToParcel(Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeString(mNewAlias);
+        dest.writeInt(mParticipantId);
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsParticipantEvent.aidl b/telephony/java/android/telephony/ims/RcsParticipantEvent.aidl
deleted file mode 100644
index c0a7789..0000000
--- a/telephony/java/android/telephony/ims/RcsParticipantEvent.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsParticipantEvent;
diff --git a/telephony/java/android/telephony/ims/RcsParticipantEvent.java b/telephony/java/android/telephony/ims/RcsParticipantEvent.java
deleted file mode 100644
index 371b8b7..0000000
--- a/telephony/java/android/telephony/ims/RcsParticipantEvent.java
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcelable;
-
-/**
- * An event that is associated with an {@link RcsParticipant}
- * @hide - TODO(sahinc) make this public
- */
-public abstract class RcsParticipantEvent implements Parcelable {
-}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsParticipantQueryParameters.aidl
similarity index 93%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsParticipantQueryParameters.aidl
index 82d985d..ea8288c 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsParticipantQueryParameters.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsParticipantQueryParameters;
diff --git a/telephony/java/android/telephony/ims/RcsParticipantQueryParameters.java b/telephony/java/android/telephony/ims/RcsParticipantQueryParameters.java
new file mode 100644
index 0000000..3611fc1
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsParticipantQueryParameters.java
@@ -0,0 +1,310 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import android.annotation.CheckResult;
+import android.annotation.IntDef;
+import android.annotation.IntRange;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.security.InvalidParameterException;
+
+/**
+ * The parameters to pass into
+ * {@link RcsMessageStore#getRcsParticipants(RcsParticipantQueryParameters)} in order to select a
+ * subset of {@link RcsThread}s present in the message store.
+ *
+ * @hide TODO - make the Builder and builder() public. The rest should stay internal only.
+ */
+public class RcsParticipantQueryParameters implements Parcelable {
+    /**
+     * Flag to set with {@link Builder#setSortProperty(int)} to sort the results in the order of
+     * creation time for faster query results
+     */
+    public static final int SORT_BY_CREATION_ORDER = 0;
+
+    /**
+     * Flag to set with {@link Builder#setSortProperty(int)} to sort depending on the
+     * {@link RcsParticipant} aliases
+     */
+    public static final int SORT_BY_ALIAS = 1;
+
+    /**
+     * Flag to set with {@link Builder#setSortProperty(int)} to sort depending on the
+     * {@link RcsParticipant} canonical addresses
+     */
+    public static final int SORT_BY_CANONICAL_ADDRESS = 2;
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({SORT_BY_CREATION_ORDER, SORT_BY_ALIAS, SORT_BY_CANONICAL_ADDRESS})
+    public @interface SortingProperty {
+    }
+
+    // The SQL "like" statement to filter against participant aliases
+    private String mAliasLike;
+    // The SQL "like" statement to filter against canonical addresses
+    private String mCanonicalAddressLike;
+    // The property to sort the result against
+    private @SortingProperty int mSortingProperty;
+    // Whether to sort the result in ascending order
+    private boolean mIsAscending;
+    // The number of results to be returned from the query
+    private int mLimit;
+    // Used to limit the results to participants of a single thread
+    private int mThreadId;
+
+    /**
+     * @hide
+     */
+    public static final String PARTICIPANT_QUERY_PARAMETERS_KEY = "participant_query_parameters";
+
+    RcsParticipantQueryParameters(int rcsThreadId, String aliasLike, String canonicalAddressLike,
+            @SortingProperty int sortingProperty, boolean isAscending,
+            int limit) {
+        mThreadId = rcsThreadId;
+        mAliasLike = aliasLike;
+        mCanonicalAddressLike = canonicalAddressLike;
+        mSortingProperty = sortingProperty;
+        mIsAscending = isAscending;
+        mLimit = limit;
+    }
+
+    /**
+     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to get
+     * the thread that the result query should be limited to.
+     *
+     * As we do not expose any sort of integer ID's to public usage, this should be hidden.
+     *
+     * @hide - not meant for public use
+     */
+    public int getThreadId() {
+        return mThreadId;
+    }
+
+    /**
+     * @return Returns the SQL-inspired "LIKE" clause that will be used to match
+     * {@link RcsParticipant}s with respect to their aliases
+     *
+     * @see RcsParticipant#getAlias()
+     */
+    public String getAliasLike() {
+        return mAliasLike;
+    }
+
+    /**
+     * @return Returns the SQL-inspired "LIKE" clause that will be used to match
+     * {@link RcsParticipant}s with respect to their canonical addresses.
+     *
+     * @see RcsParticipant#getCanonicalAddress()
+     */
+    public String getCanonicalAddressLike() {
+        return mCanonicalAddressLike;
+    }
+
+    /**
+     * @return Returns the number of {@link RcsParticipant}s to be returned from the query. A value
+     * of 0 means there is no set limit.
+     */
+    public int getLimit() {
+        return mLimit;
+    }
+
+    /**
+     * @return Returns the property that will be used to sort the result against.
+     * @see SortingProperty
+     */
+    public int getSortingProperty() {
+        return mSortingProperty;
+    }
+
+    /**
+     * @return Returns {@code true} if the result set will be sorted in ascending order,
+     * {@code false} if it will be sorted in descending order.
+     */
+    public boolean getSortDirection() {
+        return mIsAscending;
+    }
+
+    /**
+     * A helper class to build the {@link RcsParticipantQueryParameters}.
+     */
+    public static class Builder {
+        private String mAliasLike;
+        private String mCanonicalAddressLike;
+        private @SortingProperty int mSortingProperty;
+        private boolean mIsAscending;
+        private int mLimit = 100;
+        private int mThreadId;
+
+        /**
+         * Creates a new builder for {@link RcsParticipantQueryParameters} to be used in
+         * {@link RcsMessageStore#getRcsParticipants(RcsParticipantQueryParameters)}
+         */
+        public Builder() {
+            // empty implementation
+        }
+
+        /**
+         * Limits the resulting {@link RcsParticipant}s to only the given {@link RcsThread}
+         *
+         * @param rcsThread The thread that the participants should be searched in.
+         * @return The same {@link Builder} to chain methods.
+         */
+        @CheckResult
+        public Builder setThread(RcsThread rcsThread) {
+            mThreadId = rcsThread.getThreadId();
+            return this;
+        }
+
+        /**
+         * Sets an SQL-inspired "like" clause to match with participant aliases. Using a percent
+         * sign ('%') wildcard matches any sequence of zero or more characters. Using an underscore
+         * ('_') wildcard matches any single character. Not using any wildcards would only perform a
+         * string match.The input string is case-insensitive.
+         *
+         * The input "An%e" would match {@link RcsParticipant}s with names Anne, Annie, Antonie,
+         * while the input "An_e" would only match Anne.
+         *
+         * @param likeClause The like clause to use for matching {@link RcsParticipant} aliases.
+         * @return The same {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setAliasLike(String likeClause) {
+            mAliasLike = likeClause;
+            return this;
+        }
+
+        /**
+         * Sets an SQL-inspired "like" clause to match with participant addresses. Using a percent
+         * sign ('%') wildcard matches any sequence of zero or more characters. Using an underscore
+         * ('_') wildcard matches any single character. Not using any wildcards would only perform a
+         * string match. The input string is case-insensitive.
+         *
+         * The input "+999%111" would match {@link RcsParticipant}s with addresses like "+9995111"
+         * or "+99955555111", while the input "+999_111" would only match "+9995111".
+         *
+         * @param likeClause The like clause to use for matching {@link RcsParticipant} canonical
+         *                   addresses.
+         * @return The same {@link Builder} to chain methods
+         */
+        @CheckResult
+        public Builder setCanonicalAddressLike(String likeClause) {
+            mCanonicalAddressLike = likeClause;
+            return this;
+        }
+
+        /**
+         * Desired number of threads to be returned from the query. Passing in 0 will return all
+         * existing threads at once. The limit defaults to 100.
+         *
+         * @param limit The number to limit the query result to.
+         * @return The same instance of the builder to chain parameters.
+         * @throws InvalidParameterException If the given limit is negative.
+         */
+        @CheckResult
+        public Builder setResultLimit(@IntRange(from = 0) int limit)
+                throws InvalidParameterException {
+            if (limit < 0) {
+                throw new InvalidParameterException("The query limit must be non-negative");
+            }
+
+            mLimit = limit;
+            return this;
+        }
+
+        /**
+         * Sets the property where the results should be sorted against. Defaults to
+         * {@link RcsParticipantQueryParameters.SortingProperty#SORT_BY_CREATION_ORDER}
+         *
+         * @param sortingProperty against which property the results should be sorted
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setSortProperty(@SortingProperty int sortingProperty) {
+            mSortingProperty = sortingProperty;
+            return this;
+        }
+
+        /**
+         * Sets whether the results should be sorted ascending or descending
+         *
+         * @param isAscending whether the results should be sorted ascending
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setSortDirection(boolean isAscending) {
+            mIsAscending = isAscending;
+            return this;
+        }
+
+        /**
+         * Builds the {@link RcsParticipantQueryParameters} to use in
+         * {@link RcsMessageStore#getRcsParticipants(RcsParticipantQueryParameters)}
+         *
+         * @return An instance of {@link RcsParticipantQueryParameters} to use with the participant
+         * query.
+         */
+        public RcsParticipantQueryParameters build() {
+            return new RcsParticipantQueryParameters(mThreadId, mAliasLike, mCanonicalAddressLike,
+                    mSortingProperty, mIsAscending, mLimit);
+        }
+    }
+
+    /**
+     * Parcelable boilerplate below.
+     */
+    protected RcsParticipantQueryParameters(Parcel in) {
+        mAliasLike = in.readString();
+        mCanonicalAddressLike = in.readString();
+        mSortingProperty = in.readInt();
+        mIsAscending = in.readByte() == 1;
+        mLimit = in.readInt();
+        mThreadId = in.readInt();
+    }
+
+    public static final Creator<RcsParticipantQueryParameters> CREATOR =
+            new Creator<RcsParticipantQueryParameters>() {
+                @Override
+                public RcsParticipantQueryParameters createFromParcel(Parcel in) {
+                    return new RcsParticipantQueryParameters(in);
+                }
+
+                @Override
+                public RcsParticipantQueryParameters[] newArray(int size) {
+                    return new RcsParticipantQueryParameters[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(mAliasLike);
+        dest.writeString(mCanonicalAddressLike);
+        dest.writeInt(mSortingProperty);
+        dest.writeByte((byte) (mIsAscending ? 1 : 0));
+        dest.writeInt(mLimit);
+        dest.writeInt(mThreadId);
+    }
+
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsParticipantQueryResult.aidl
similarity index 94%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsParticipantQueryResult.aidl
index 82d985d..db5c00c 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsParticipantQueryResult.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsParticipantQueryResult;
diff --git a/telephony/java/android/telephony/ims/RcsParticipantQueryResult.java b/telephony/java/android/telephony/ims/RcsParticipantQueryResult.java
new file mode 100644
index 0000000..2f4ab46
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsParticipantQueryResult.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The result of a {@link RcsMessageStore#getRcsParticipants(RcsParticipantQueryParameters)}
+ * call. This class allows getting the token for querying the next batch of participants in order to
+ * prevent handling large amounts of data at once.
+ *
+ * @hide
+ */
+public class RcsParticipantQueryResult implements Parcelable {
+    // A token for the caller to continue their query for the next batch of results
+    private RcsQueryContinuationToken mContinuationToken;
+    // The list of participant IDs returned with this query
+    private List<Integer> mParticipants;
+
+    /**
+     * Internal constructor for {@link com.android.internal.telephony.ims.RcsMessageStoreController}
+     * to create query results
+     *
+     * @hide
+     */
+    public RcsParticipantQueryResult(
+            RcsQueryContinuationToken continuationToken,
+            List<Integer> participants) {
+        mContinuationToken = continuationToken;
+        mParticipants = participants;
+    }
+
+    /**
+     * Returns a token to call
+     * {@link RcsMessageStore#getRcsParticipants(RcsQueryContinuationToken)}
+     * to get the next batch of {@link RcsParticipant}s.
+     */
+    @Nullable
+    public RcsQueryContinuationToken getContinuationToken() {
+        return mContinuationToken;
+    }
+
+    /**
+     * Returns all the {@link RcsParticipant}s in the current query result. Call {@link
+     * RcsMessageStore#getRcsParticipants(RcsQueryContinuationToken)} to get the next
+     * batch of {@link RcsParticipant}s.
+     */
+    @NonNull
+    public List<RcsParticipant> getParticipants() {
+        List<RcsParticipant> participantList = new ArrayList<>();
+        for (Integer participantId : mParticipants) {
+            participantList.add(new RcsParticipant(participantId));
+        }
+
+        return participantList;
+    }
+
+    protected RcsParticipantQueryResult(Parcel in) {
+        mContinuationToken = in.readParcelable(
+                RcsQueryContinuationToken.class.getClassLoader());
+    }
+
+    public static final Creator<RcsParticipantQueryResult> CREATOR =
+            new Creator<RcsParticipantQueryResult>() {
+                @Override
+                public RcsParticipantQueryResult createFromParcel(Parcel in) {
+                    return new RcsParticipantQueryResult(in);
+                }
+
+                @Override
+                public RcsParticipantQueryResult[] newArray(int size) {
+                    return new RcsParticipantQueryResult[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeParcelable(mContinuationToken, flags);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsQueryContinuationToken.aidl
similarity index 94%
copy from telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
copy to telephony/java/android/telephony/ims/RcsQueryContinuationToken.aidl
index 82d985d..319379a 100644
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.aidl
+++ b/telephony/java/android/telephony/ims/RcsQueryContinuationToken.aidl
@@ -17,4 +17,4 @@
 
 package android.telephony.ims;
 
-parcelable RcsThreadIconChangedEvent;
+parcelable RcsQueryContinuationToken;
diff --git a/telephony/java/android/telephony/ims/RcsQueryContinuationToken.java b/telephony/java/android/telephony/ims/RcsQueryContinuationToken.java
new file mode 100644
index 0000000..e880651
--- /dev/null
+++ b/telephony/java/android/telephony/ims/RcsQueryContinuationToken.java
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.telephony.ims;
+
+import android.annotation.IntDef;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * This interface allows using the same implementation for continuation token usage in
+ * {@link com.android.providers.telephony.RcsProvider}
+ * @hide - TODO make getQueryType() and types public - the rest should stay internal
+ */
+public class RcsQueryContinuationToken implements Parcelable {
+    /**
+     * Denotes that this {@link RcsQueryContinuationToken} token is meant to allow continuing
+     * {@link RcsEvent} queries
+     */
+    public static final int EVENT_QUERY_CONTINUATION_TOKEN_TYPE = 0;
+
+    /**
+     * Denotes that this {@link RcsQueryContinuationToken} token is meant to allow continuing
+     * {@link RcsMessage} queries
+     */
+    public static final int MESSAGE_QUERY_CONTINUATION_TOKEN_TYPE = 1;
+
+    /**
+     * Denotes that this {@link RcsQueryContinuationToken} token is meant to allow continuing
+     * {@link RcsParticipant} queries
+     */
+    public static final int PARTICIPANT_QUERY_CONTINUATION_TOKEN_TYPE = 2;
+
+    /**
+     * Denotes that this {@link RcsQueryContinuationToken} token is meant to allow continuing
+     * {@link RcsThread} queries
+     */
+    public static final int THREAD_QUERY_CONTINUATION_TOKEN_TYPE = 3;
+
+    /**
+     * @hide - not meant for public use
+     */
+    public static final String QUERY_CONTINUATION_TOKEN = "query_continuation_token";
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({EVENT_QUERY_CONTINUATION_TOKEN_TYPE, MESSAGE_QUERY_CONTINUATION_TOKEN_TYPE,
+        PARTICIPANT_QUERY_CONTINUATION_TOKEN_TYPE, THREAD_QUERY_CONTINUATION_TOKEN_TYPE})
+    public @interface ContinuationTokenType {}
+
+    // The type of query this token should allow to continue
+    private @ContinuationTokenType int mQueryType;
+    // The raw query string for the initial query
+    private final String mRawQuery;
+    // The number of results that is returned with each query
+    private final int mLimit;
+    // The offset value that this query should start the query from
+    private int mOffset;
+
+    /**
+     * @hide
+     */
+    public RcsQueryContinuationToken(@ContinuationTokenType int queryType, String rawQuery,
+            int limit, int offset) {
+        mQueryType = queryType;
+        mRawQuery = rawQuery;
+        mLimit = limit;
+        mOffset = offset;
+    }
+
+    /**
+     * Returns the original raw query used on {@link com.android.providers.telephony.RcsProvider}
+     * @hide
+     */
+    public String getRawQuery() {
+        return mRawQuery;
+    }
+
+    /**
+     * Returns which index this continuation query should start from
+     * @hide
+     */
+    public int getOffset() {
+        return mOffset;
+    }
+
+    /**
+     * Increments the offset by the amount of result rows returned with the continuation query for
+     * the next query.
+     * @hide
+     */
+    public void incrementOffset() {
+        mOffset += mLimit;
+    }
+
+    /**
+     * Returns the type of query that this {@link RcsQueryContinuationToken} is intended to be used
+     * to continue.
+     */
+    public @ContinuationTokenType int getQueryType() {
+        return mQueryType;
+    }
+
+    protected RcsQueryContinuationToken(Parcel in) {
+        mQueryType = in.readInt();
+        mRawQuery = in.readString();
+        mLimit = in.readInt();
+        mOffset = in.readInt();
+    }
+
+    public static final Creator<RcsQueryContinuationToken> CREATOR =
+            new Creator<RcsQueryContinuationToken>() {
+                @Override
+                public RcsQueryContinuationToken createFromParcel(Parcel in) {
+                    return new RcsQueryContinuationToken(in);
+                }
+
+                @Override
+                public RcsQueryContinuationToken[] newArray(int size) {
+                    return new RcsQueryContinuationToken[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(mQueryType);
+        dest.writeString(mRawQuery);
+        dest.writeInt(mLimit);
+        dest.writeInt(mOffset);
+    }
+}
diff --git a/telephony/java/android/telephony/ims/RcsTextPart.aidl b/telephony/java/android/telephony/ims/RcsTextPart.aidl
deleted file mode 100644
index 4f9fe1f..0000000
--- a/telephony/java/android/telephony/ims/RcsTextPart.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsTextPart;
diff --git a/telephony/java/android/telephony/ims/RcsTextPart.java b/telephony/java/android/telephony/ims/RcsTextPart.java
deleted file mode 100644
index 2a72df1..0000000
--- a/telephony/java/android/telephony/ims/RcsTextPart.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcel;
-
-/**
- * A part of a composite {@link RcsMessage} that holds a string
- * @hide - TODO(sahinc) make this public
- */
-public class RcsTextPart extends RcsPart {
-    public static final Creator<RcsTextPart> CREATOR = new Creator<RcsTextPart>() {
-        @Override
-        public RcsTextPart createFromParcel(Parcel in) {
-            return new RcsTextPart(in);
-        }
-
-        @Override
-        public RcsTextPart[] newArray(int size) {
-            return new RcsTextPart[size];
-        }
-    };
-
-    protected RcsTextPart(Parcel in) {
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-    }
-}
diff --git a/telephony/java/android/telephony/ims/RcsThread.aidl b/telephony/java/android/telephony/ims/RcsThread.aidl
deleted file mode 100644
index d9cf6db..0000000
--- a/telephony/java/android/telephony/ims/RcsThread.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony;
-
-parcelable RcsThread;
\ No newline at end of file
diff --git a/telephony/java/android/telephony/ims/RcsThread.java b/telephony/java/android/telephony/ims/RcsThread.java
index c0a0d94..238f5e7 100644
--- a/telephony/java/android/telephony/ims/RcsThread.java
+++ b/telephony/java/android/telephony/ims/RcsThread.java
@@ -16,60 +16,117 @@
 
 package android.telephony.ims;
 
-import android.os.Parcel;
-import android.os.Parcelable;
-import android.util.Log;
+import static android.provider.Telephony.RcsColumns.RcsUnifiedThreadColumns.THREAD_TYPE_1_TO_1;
+import static android.provider.Telephony.RcsColumns.RcsUnifiedThreadColumns.THREAD_TYPE_GROUP;
+
+import android.annotation.NonNull;
+import android.annotation.WorkerThread;
+
+import com.android.internal.annotations.VisibleForTesting;
 
 /**
  * RcsThread represents a single RCS conversation thread. It holds messages that were sent and
  * received and events that occurred on that thread.
- * @hide - TODO(sahinc) make this public
+ *
+ * @hide - TODO(109759350) make this public
  */
-public abstract class RcsThread implements Parcelable {
-    // Since this is an abstract class that gets parcelled, the sub-classes need to write these
-    // magic values into the parcel so that we know which type to unparcel into.
-    protected static final int RCS_1_TO_1_TYPE = 998;
-    protected static final int RCS_GROUP_TYPE = 999;
-
+public abstract class RcsThread {
+    // The rcs_participant_thread_id that represents this thread in the database
     protected int mThreadId;
 
+    /**
+     * @hide
+     */
     protected RcsThread(int threadId) {
         mThreadId = threadId;
     }
 
-    protected RcsThread(Parcel in) {
-        mThreadId = in.readInt();
+    /**
+     * @return Returns the summary of the latest message in this {@link RcsThread} packaged in an
+     * {@link RcsMessageSnippet} object
+     */
+    @WorkerThread
+    @NonNull
+    public RcsMessageSnippet getSnippet() throws RcsMessageStoreException {
+        return RcsControllerCall.call(iRcs -> iRcs.getMessageSnippet(mThreadId));
     }
 
-    public static final Creator<RcsThread> CREATOR = new Creator<RcsThread>() {
-        @Override
-        public RcsThread createFromParcel(Parcel in) {
-            int type = in.readInt();
-
-            switch (type) {
-                case RCS_1_TO_1_TYPE:
-                    return new Rcs1To1Thread(in);
-                case RCS_GROUP_TYPE:
-                    return new RcsGroupThread(in);
-                default:
-                    Log.e(RcsMessageStore.TAG, "Cannot unparcel RcsThread, wrong type: " + type);
-            }
-            return null;
-        }
-
-        @Override
-        public RcsThread[] newArray(int size) {
-            return new RcsThread[0];
-        }
-    };
-
-    @Override
-    public int describeContents() {
-        return 0;
+    /**
+     * Adds a new {@link RcsIncomingMessage} to this RcsThread and persists it in storage.
+     *
+     * @throws RcsMessageStoreException if the message could not be persisted into storage.
+     */
+    @WorkerThread
+    @NonNull
+    public RcsIncomingMessage addIncomingMessage(
+            @NonNull RcsIncomingMessageCreationParameters rcsIncomingMessageCreationParameters)
+            throws RcsMessageStoreException {
+        return new RcsIncomingMessage(RcsControllerCall.call(iRcs -> iRcs.addIncomingMessage(
+                mThreadId, rcsIncomingMessageCreationParameters)));
     }
 
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeInt(mThreadId);
+    /**
+     * Adds a new {@link RcsOutgoingMessage} to this RcsThread and persists it in storage.
+     *
+     * @throws RcsMessageStoreException if the message could not be persisted into storage.
+     */
+    @WorkerThread
+    @NonNull
+    public RcsOutgoingMessage addOutgoingMessage(
+            @NonNull RcsMessageCreationParameters rcsMessageCreationParameters)
+            throws RcsMessageStoreException {
+        int messageId = RcsControllerCall.call(iRcs -> iRcs.addOutgoingMessage(
+                mThreadId, rcsMessageCreationParameters));
+
+        return new RcsOutgoingMessage(messageId);
+    }
+
+    /**
+     * Deletes an {@link RcsMessage} from this RcsThread and updates the storage.
+     *
+     * @param rcsMessage The message to delete from the thread
+     * @throws RcsMessageStoreException if the message could not be deleted
+     */
+    @WorkerThread
+    public void deleteMessage(@NonNull RcsMessage rcsMessage) throws RcsMessageStoreException {
+        RcsControllerCall.callWithNoReturn(
+                iRcs -> iRcs.deleteMessage(rcsMessage.getId(), rcsMessage.isIncoming(), mThreadId,
+                        isGroup()));
+    }
+
+    /**
+     * Convenience function for loading all the {@link RcsMessage}s in this {@link RcsThread}. For
+     * a more detailed and paginated query, please use
+     * {@link RcsMessageStore#getRcsMessages(RcsMessageQueryParameters)}
+     *
+     * @return Loads the {@link RcsMessage}s in this thread and returns them in an immutable list.
+     * @throws RcsMessageStoreException if the messages could not be read from the storage
+     */
+    @WorkerThread
+    @NonNull
+    public RcsMessageQueryResult getMessages() throws RcsMessageStoreException {
+        RcsMessageQueryParameters queryParameters =
+                new RcsMessageQueryParameters.Builder().setThread(this).build();
+        return RcsControllerCall.call(iRcs -> iRcs.getMessages(queryParameters));
+    }
+
+    /**
+     * @return Returns whether this is a group thread or not
+     */
+    public abstract boolean isGroup();
+
+    /**
+     * @hide
+     */
+    @VisibleForTesting
+    public int getThreadId() {
+        return mThreadId;
+    }
+
+    /**
+     * @hide
+     */
+    public int getThreadType() {
+        return isGroup() ? THREAD_TYPE_GROUP : THREAD_TYPE_1_TO_1;
     }
 }
diff --git a/telephony/java/android/telephony/ims/RcsThreadEvent.java b/telephony/java/android/telephony/ims/RcsThreadEvent.java
deleted file mode 100644
index e10baab..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadEvent.java
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcelable;
-
-/**
- * An event that happened on an {@link RcsThread}.
- * @hide - TODO(sahinc) make this public
- */
-public abstract class RcsThreadEvent implements Parcelable {
-}
diff --git a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.java b/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.java
deleted file mode 100644
index b308fef..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadIconChangedEvent.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcel;
-
-/**
- * An event that indicates an {@link RcsGroupThread}'s icon was changed.
- * @hide - TODO(sahinc) make this public
- */
-public class RcsThreadIconChangedEvent extends RcsThreadEvent {
-    public static final Creator<RcsThreadIconChangedEvent> CREATOR =
-            new Creator<RcsThreadIconChangedEvent>() {
-        @Override
-        public RcsThreadIconChangedEvent createFromParcel(Parcel in) {
-            return new RcsThreadIconChangedEvent(in);
-        }
-
-        @Override
-        public RcsThreadIconChangedEvent[] newArray(int size) {
-            return new RcsThreadIconChangedEvent[size];
-        }
-    };
-
-    protected RcsThreadIconChangedEvent(Parcel in) {
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-    }
-}
diff --git a/telephony/java/android/telephony/ims/RcsThreadNameChangedEvent.aidl b/telephony/java/android/telephony/ims/RcsThreadNameChangedEvent.aidl
deleted file mode 100644
index 54a311d..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadNameChangedEvent.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsThreadNameChangedEvent;
diff --git a/telephony/java/android/telephony/ims/RcsThreadNameChangedEvent.java b/telephony/java/android/telephony/ims/RcsThreadNameChangedEvent.java
deleted file mode 100644
index 6f5cfdf..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadNameChangedEvent.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcel;
-
-/**
- * An event that indicates an {@link RcsGroupThread}'s name was changed.
- * @hide - TODO(sahinc) make this public
- */
-public class RcsThreadNameChangedEvent extends RcsThreadEvent {
-    public static final Creator<RcsThreadNameChangedEvent> CREATOR =
-            new Creator<RcsThreadNameChangedEvent>() {
-        @Override
-        public RcsThreadNameChangedEvent createFromParcel(Parcel in) {
-            return new RcsThreadNameChangedEvent(in);
-        }
-
-        @Override
-        public RcsThreadNameChangedEvent[] newArray(int size) {
-            return new RcsThreadNameChangedEvent[size];
-        }
-    };
-
-    protected RcsThreadNameChangedEvent(Parcel in) {
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-    }
-}
diff --git a/telephony/java/android/telephony/ims/RcsThreadParticipantJoinedEvent.aidl b/telephony/java/android/telephony/ims/RcsThreadParticipantJoinedEvent.aidl
deleted file mode 100644
index 047a424..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadParticipantJoinedEvent.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsThreadParticipantJoinedEvent;
diff --git a/telephony/java/android/telephony/ims/RcsThreadParticipantJoinedEvent.java b/telephony/java/android/telephony/ims/RcsThreadParticipantJoinedEvent.java
deleted file mode 100644
index 5c4073c..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadParticipantJoinedEvent.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcel;
-
-/**
- * An event that indicates an RCS participant has joined an {@link RcsGroupThread}.
- * @hide - TODO(sahinc) make this public
- */
-public class RcsThreadParticipantJoinedEvent extends RcsThreadEvent {
-    public static final Creator<RcsThreadParticipantJoinedEvent> CREATOR =
-            new Creator<RcsThreadParticipantJoinedEvent>() {
-        @Override
-        public RcsThreadParticipantJoinedEvent createFromParcel(Parcel in) {
-            return new RcsThreadParticipantJoinedEvent(in);
-        }
-
-        @Override
-        public RcsThreadParticipantJoinedEvent[] newArray(int size) {
-            return new RcsThreadParticipantJoinedEvent[size];
-        }
-    };
-
-    protected RcsThreadParticipantJoinedEvent(Parcel in) {
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-    }
-}
diff --git a/telephony/java/android/telephony/ims/RcsThreadParticipantLeftEvent.aidl b/telephony/java/android/telephony/ims/RcsThreadParticipantLeftEvent.aidl
deleted file mode 100644
index 52f9bbd..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadParticipantLeftEvent.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
- *
- * Copyright 2019, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-parcelable RcsThreadParticipantLeftEvent;
diff --git a/telephony/java/android/telephony/ims/RcsThreadParticipantLeftEvent.java b/telephony/java/android/telephony/ims/RcsThreadParticipantLeftEvent.java
deleted file mode 100644
index 4bf86b9..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadParticipantLeftEvent.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.telephony.ims;
-
-import android.os.Parcel;
-
-/**
- * An event that indicates an RCS participant has left an {@link RcsGroupThread}.
- * @hide - TODO(sahinc) make this public
- */
-public class RcsThreadParticipantLeftEvent extends RcsThreadEvent {
-    public static final Creator<RcsThreadParticipantLeftEvent> CREATOR =
-            new Creator<RcsThreadParticipantLeftEvent>() {
-        @Override
-        public RcsThreadParticipantLeftEvent createFromParcel(Parcel in) {
-            return new RcsThreadParticipantLeftEvent(in);
-        }
-
-        @Override
-        public RcsThreadParticipantLeftEvent[] newArray(int size) {
-            return new RcsThreadParticipantLeftEvent[size];
-        }
-    };
-
-    protected RcsThreadParticipantLeftEvent(Parcel in) {
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-    }
-}
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.aidl b/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.aidl
deleted file mode 100644
index 7bcebfa..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.aidl
+++ /dev/null
@@ -1,20 +0,0 @@
-/*
-**
-** Copyright 2018, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-**     http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
-
-package android.telephony.ims;
-
-parcelable RcsThreadQueryContinuationToken;
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.java b/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.java
deleted file mode 100644
index 931e93d..0000000
--- a/telephony/java/android/telephony/ims/RcsThreadQueryContinuationToken.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.telephony.ims;
-
-import android.os.Parcel;
-import android.os.Parcelable;
-
-/**
- * A continuation token to provide for {@link RcsMessageStore#getRcsThreads}. Use this token to
- * break large queries into manageable chunks
- * @hide - TODO make this public
- */
-public class RcsThreadQueryContinuationToken implements Parcelable {
-    protected RcsThreadQueryContinuationToken(Parcel in) {
-    }
-
-    public static final Creator<RcsThreadQueryContinuationToken> CREATOR =
-            new Creator<RcsThreadQueryContinuationToken>() {
-                @Override
-                public RcsThreadQueryContinuationToken createFromParcel(Parcel in) {
-                    return new RcsThreadQueryContinuationToken(in);
-                }
-
-                @Override
-                public RcsThreadQueryContinuationToken[] newArray(int size) {
-                    return new RcsThreadQueryContinuationToken[size];
-                }
-            };
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-    }
-}
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryParameters.aidl b/telephony/java/android/telephony/ims/RcsThreadQueryParameters.aidl
index feb2d4d..52e73ce 100644
--- a/telephony/java/android/telephony/ims/RcsThreadQueryParameters.aidl
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryParameters.aidl
@@ -1,19 +1,19 @@
 /*
-**
-** Copyright 2018, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-**     http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
+ *
+ * Copyright 2019, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 package android.telephony.ims;
 
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryParameters.java b/telephony/java/android/telephony/ims/RcsThreadQueryParameters.java
index f2c4ab1..4aa4207 100644
--- a/telephony/java/android/telephony/ims/RcsThreadQueryParameters.java
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryParameters.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,72 +17,133 @@
 package android.telephony.ims;
 
 import android.annotation.CheckResult;
+import android.annotation.IntDef;
+import android.annotation.IntRange;
+import android.annotation.NonNull;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
 import java.security.InvalidParameterException;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashSet;
+import java.util.List;
 import java.util.Set;
 
 /**
  * The parameters to pass into {@link RcsMessageStore#getRcsThreads(RcsThreadQueryParameters)} in
  * order to select a subset of {@link RcsThread}s present in the message store.
+ *
  * @hide TODO - make the Builder and builder() public. The rest should stay internal only.
  */
 public class RcsThreadQueryParameters implements Parcelable {
-    private final boolean mIsGroup;
-    private final Set<RcsParticipant> mRcsParticipants;
+    /**
+     * Bitmask flag to be used with {@link Builder#setThreadType(int)} to make
+     * {@link RcsMessageStore#getRcsThreads(RcsThreadQueryParameters)} return
+     * {@link RcsGroupThread}s.
+     */
+    public static final int THREAD_TYPE_GROUP = 0x0001;
+
+    /**
+     * Bitmask flag to be used with {@link Builder#setThreadType(int)} to make
+     * {@link RcsMessageStore#getRcsThreads(RcsThreadQueryParameters)} return
+     * {@link Rcs1To1Thread}s.
+     */
+    public static final int THREAD_TYPE_1_TO_1 = 0x0002;
+
+    // The type of threads to be filtered with the query
+    private final int mThreadType;
+    // The list of participants that are expected in the resulting threads
+    private final List<Integer> mRcsParticipantIds;
+    // The number of RcsThread's that should be returned with this query
     private final int mLimit;
+    // The property which the result of the query should be sorted against
+    private final @SortingProperty int mSortingProperty;
+    // Whether the sorting should be done in ascending
     private final boolean mIsAscending;
 
-    RcsThreadQueryParameters(boolean isGroup, Set<RcsParticipant> participants, int limit,
-            boolean isAscending) {
-        mIsGroup = isGroup;
-        mRcsParticipants = participants;
+    /**
+     * Flag to be used with {@link Builder#setSortProperty(int)} to denote that the results should
+     * be sorted in the order of {@link RcsThread} creation time for faster results.
+     */
+    public static final int SORT_BY_CREATION_ORDER = 0;
+
+    /**
+     * Flag to be used with {@link Builder#setSortProperty(int)} to denote that the results should
+     * be sorted according to the timestamp of {@link RcsThread#getSnippet()}
+     */
+    public static final int SORT_BY_TIMESTAMP = 1;
+
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({SORT_BY_CREATION_ORDER, SORT_BY_TIMESTAMP})
+    public @interface SortingProperty {
+    }
+
+    /**
+     * @hide
+     */
+    public static final String THREAD_QUERY_PARAMETERS_KEY = "thread_query_parameters";
+
+    RcsThreadQueryParameters(int threadType, Set<RcsParticipant> participants,
+            int limit, int sortingProperty, boolean isAscending) {
+        mThreadType = threadType;
+        mRcsParticipantIds = convertParticipantSetToIdList(participants);
         mLimit = limit;
+        mSortingProperty = sortingProperty;
         mIsAscending = isAscending;
     }
 
-    /**
-     * Returns a new builder to build a query with.
-     * TODO - make public
-     */
-    public static Builder builder() {
-        return new Builder();
+    private static List<Integer> convertParticipantSetToIdList(Set<RcsParticipant> participants) {
+        List<Integer> ids = new ArrayList<>(participants.size());
+        for (RcsParticipant participant : participants) {
+            ids.add(participant.getId());
+        }
+        return ids;
     }
 
     /**
      * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to get
-     * the list of participants.
-     * @hide
+     * the list of participant IDs.
+     *
+     * As we don't expose any integer ID's to API users, this should stay hidden
+     *
+     * @hide - not meant for public use
      */
-    public Set<RcsParticipant> getRcsParticipants() {
-        return mRcsParticipants;
+    public List<Integer> getRcsParticipantsIds() {
+        return Collections.unmodifiableList(mRcsParticipantIds);
     }
 
     /**
-     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to get
-     * whether group threads should be queried
-     * @hide
+     * @return Returns the bitmask flag for types of {@link RcsThread}s that this query should
+     * return.
      */
-    public boolean isGroupThread() {
-        return mIsGroup;
+    public int getThreadType() {
+        return mThreadType;
     }
 
     /**
-     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to get
-     * the number of tuples the result query should be limited to.
+     * @return Returns the number of {@link RcsThread}s to be returned from the query. A value
+     * of 0 means there is no set limit.
      */
     public int getLimit() {
         return mLimit;
     }
 
     /**
-     * This is used in {@link com.android.internal.telephony.ims.RcsMessageStoreController} to
-     * determine the sort order.
+     * @return Returns the property that will be used to sort the result against.
+     * @see SortingProperty
      */
-    public boolean isAscending() {
+    public @SortingProperty int getSortingProperty() {
+        return mSortingProperty;
+    }
+
+    /**
+     * @return Returns {@code true} if the result set will be sorted in ascending order,
+     * {@code false} if it will be sorted in descending order.
+     */
+    public boolean getSortDirection() {
         return mIsAscending;
     }
 
@@ -90,64 +151,74 @@
      * A helper class to build the {@link RcsThreadQueryParameters}.
      */
     public static class Builder {
-        private boolean mIsGroupThread;
+        private int mThreadType;
         private Set<RcsParticipant> mParticipants;
         private int mLimit = 100;
+        private @SortingProperty int mSortingProperty;
         private boolean mIsAscending;
 
         /**
-         * Package private constructor for {@link RcsThreadQueryParameters.Builder}. To obtain this,
-         * {@link RcsThreadQueryParameters#builder()} needs to be called.
+         * Constructs a {@link RcsThreadQueryParameters.Builder} to help build an
+         * {@link RcsThreadQueryParameters}
          */
-        Builder() {
+        public Builder() {
             mParticipants = new HashSet<>();
         }
 
         /**
          * Limits the query to only return group threads.
-         * @param isGroupThread Whether to limit the query result to group threads.
+         *
+         * @param threadType Whether to limit the query result to group threads.
          * @return The same instance of the builder to chain parameters.
+         * @see RcsThreadQueryParameters#THREAD_TYPE_GROUP
+         * @see RcsThreadQueryParameters#THREAD_TYPE_1_TO_1
          */
         @CheckResult
-        public Builder isGroupThread(boolean isGroupThread) {
-            mIsGroupThread = isGroupThread;
+        public Builder setThreadType(int threadType) {
+            mThreadType = threadType;
             return this;
         }
 
         /**
-         * Limits the query to only return threads that contain the given participant.
+         * Limits the query to only return threads that contain the given participant. If this
+         * property was not set, participants will not be taken into account while querying for
+         * threads.
+         *
          * @param participant The participant that must be included in all of the returned threads.
          * @return The same instance of the builder to chain parameters.
          */
         @CheckResult
-        public Builder withParticipant(RcsParticipant participant) {
+        public Builder setParticipant(@NonNull RcsParticipant participant) {
             mParticipants.add(participant);
             return this;
         }
 
         /**
-         * Limits the query to only return threads that contain the given list of participants.
+         * Limits the query to only return threads that contain the given list of participants. If
+         * this property was not set, participants will not be taken into account while querying
+         * for threads.
+         *
          * @param participants An iterable list of participants that must be included in all of the
          *                     returned threads.
          * @return The same instance of the builder to chain parameters.
          */
         @CheckResult
-        public Builder withParticipants(Iterable<RcsParticipant> participants) {
-            for (RcsParticipant participant : participants) {
-                mParticipants.add(participant);
-            }
+        public Builder setParticipants(@NonNull List<RcsParticipant> participants) {
+            mParticipants.addAll(participants);
             return this;
         }
 
         /**
          * Desired number of threads to be returned from the query. Passing in 0 will return all
          * existing threads at once. The limit defaults to 100.
+         *
          * @param limit The number to limit the query result to.
          * @return The same instance of the builder to chain parameters.
          * @throws InvalidParameterException If the given limit is negative.
          */
         @CheckResult
-        public Builder limitResultsTo(int limit) throws InvalidParameterException {
+        public Builder setResultLimit(@IntRange(from = 0) int limit)
+                throws InvalidParameterException {
             if (limit < 0) {
                 throw new InvalidParameterException("The query limit must be non-negative");
             }
@@ -157,15 +228,26 @@
         }
 
         /**
-         * Sorts the results returned from the query via thread IDs.
+         * Sets the property where the results should be sorted against. Defaults to
+         * {@link SortingProperty#SORT_BY_CREATION_ORDER}
          *
-         * TODO - add sorting support for other fields
-         *
-         * @param isAscending whether to sort in ascending order or not
+         * @param sortingProperty whether to sort in ascending order or not
          * @return The same instance of the builder to chain parameters.
          */
         @CheckResult
-        public Builder sort(boolean isAscending) {
+        public Builder setSortProperty(@SortingProperty int sortingProperty) {
+            mSortingProperty = sortingProperty;
+            return this;
+        }
+
+        /**
+         * Sets whether the results should be sorted ascending or descending
+         *
+         * @param isAscending whether the results should be sorted ascending
+         * @return The same instance of the builder to chain parameters.
+         */
+        @CheckResult
+        public Builder setSortDirection(boolean isAscending) {
             mIsAscending = isAscending;
             return this;
         }
@@ -177,8 +259,8 @@
          * @return An instance of {@link RcsThreadQueryParameters} to use with the thread query.
          */
         public RcsThreadQueryParameters build() {
-            return new RcsThreadQueryParameters(
-                    mIsGroupThread, mParticipants, mLimit, mIsAscending);
+            return new RcsThreadQueryParameters(mThreadType, mParticipants, mLimit,
+                    mSortingProperty, mIsAscending);
         }
     }
 
@@ -186,14 +268,12 @@
      * Parcelable boilerplate below.
      */
     protected RcsThreadQueryParameters(Parcel in) {
-        mIsGroup = in.readBoolean();
-
-        ArrayList<RcsParticipant> participantArrayList = new ArrayList<>();
-        in.readTypedList(participantArrayList, RcsParticipant.CREATOR);
-        mRcsParticipants = new HashSet<>(participantArrayList);
-
+        mThreadType = in.readInt();
+        mRcsParticipantIds = new ArrayList<>();
+        in.readList(mRcsParticipantIds, Integer.class.getClassLoader());
         mLimit = in.readInt();
-        mIsAscending = in.readBoolean();
+        mSortingProperty = in.readInt();
+        mIsAscending = in.readByte() == 1;
     }
 
     public static final Creator<RcsThreadQueryParameters> CREATOR =
@@ -216,10 +296,10 @@
 
     @Override
     public void writeToParcel(Parcel dest, int flags) {
-        dest.writeBoolean(mIsGroup);
-        dest.writeTypedList(new ArrayList<>(mRcsParticipants));
+        dest.writeInt(mThreadType);
+        dest.writeList(mRcsParticipantIds);
         dest.writeInt(mLimit);
-        dest.writeBoolean(mIsAscending);
+        dest.writeInt(mSortingProperty);
+        dest.writeByte((byte) (mIsAscending ? 1 : 0));
     }
-
 }
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryResult.aidl b/telephony/java/android/telephony/ims/RcsThreadQueryResult.aidl
index 4b06529..b1d5cf4 100644
--- a/telephony/java/android/telephony/ims/RcsThreadQueryResult.aidl
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryResult.aidl
@@ -1,19 +1,19 @@
 /*
-**
-** Copyright 2018, The Android Open Source Project
-**
-** Licensed under the Apache License, Version 2.0 (the "License");
-** you may not use this file except in compliance with the License.
-** You may obtain a copy of the License at
-**
-**     http://www.apache.org/licenses/LICENSE-2.0
-**
-** Unless required by applicable law or agreed to in writing, software
-** distributed under the License is distributed on an "AS IS" BASIS,
-** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-** See the License for the specific language governing permissions and
-** limitations under the License.
-*/
+ *
+ * Copyright 2019, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 
 package android.telephony.ims;
 
diff --git a/telephony/java/android/telephony/ims/RcsThreadQueryResult.java b/telephony/java/android/telephony/ims/RcsThreadQueryResult.java
index 47715f8..6515933 100644
--- a/telephony/java/android/telephony/ims/RcsThreadQueryResult.java
+++ b/telephony/java/android/telephony/ims/RcsThreadQueryResult.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 The Android Open Source Project
+ * Copyright (C) 2019 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,22 +16,30 @@
 
 package android.telephony.ims;
 
+import static android.provider.Telephony.RcsColumns.RcsUnifiedThreadColumns.THREAD_TYPE_1_TO_1;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.os.Parcel;
 import android.os.Parcelable;
 
+import com.android.ims.RcsTypeIdPair;
+
+import java.util.ArrayList;
 import java.util.List;
 
 /**
- * The result of a {@link RcsMessageStore#getRcsThreads(RcsThreadQueryContinuationToken,
- * RcsThreadQueryParameters)}
+ * The result of a {@link RcsMessageStore#getRcsThreads(RcsThreadQueryParameters)}
  * call. This class allows getting the token for querying the next batch of threads in order to
  * prevent handling large amounts of data at once.
  *
  * @hide
  */
 public class RcsThreadQueryResult implements Parcelable {
-    private RcsThreadQueryContinuationToken mContinuationToken;
-    private List<RcsThread> mRcsThreads;
+    // A token for the caller to continue their query for the next batch of results
+    private RcsQueryContinuationToken mContinuationToken;
+    // The list of thread IDs returned with this query
+    private List<RcsTypeIdPair> mRcsThreadIds;
 
     /**
      * Internal constructor for {@link com.android.internal.telephony.ims.RcsMessageStoreController}
@@ -40,31 +48,47 @@
      * @hide
      */
     public RcsThreadQueryResult(
-            RcsThreadQueryContinuationToken continuationToken, List<RcsThread> rcsThreads) {
+            RcsQueryContinuationToken continuationToken,
+            List<RcsTypeIdPair> rcsThreadIds) {
         mContinuationToken = continuationToken;
-        mRcsThreads = rcsThreads;
+        mRcsThreadIds = rcsThreadIds;
     }
 
     /**
      * Returns a token to call
-     * {@link RcsMessageStore#getRcsThreads(RcsThreadQueryContinuationToken)}
+     * {@link RcsMessageStore#getRcsThreads(RcsQueryContinuationToken)}
      * to get the next batch of {@link RcsThread}s.
      */
-    public RcsThreadQueryContinuationToken nextChunkToken() {
+    @Nullable
+    public RcsQueryContinuationToken getContinuationToken() {
         return mContinuationToken;
     }
 
     /**
      * Returns all the RcsThreads in the current query result. Call {@link
-     * RcsMessageStore#getRcsThreads(RcsThreadQueryContinuationToken)} to get the next batch of
+     * RcsMessageStore#getRcsThreads(RcsQueryContinuationToken)} to get the next batch of
      * {@link RcsThread}s.
      */
+    @NonNull
     public List<RcsThread> getThreads() {
-        return mRcsThreads;
+        List<RcsThread> rcsThreads = new ArrayList<>();
+
+        for (RcsTypeIdPair typeIdPair : mRcsThreadIds) {
+            if (typeIdPair.getType() == THREAD_TYPE_1_TO_1) {
+                rcsThreads.add(new Rcs1To1Thread(typeIdPair.getId()));
+            } else {
+                rcsThreads.add(new RcsGroupThread(typeIdPair.getId()));
+            }
+        }
+
+        return rcsThreads;
     }
 
     protected RcsThreadQueryResult(Parcel in) {
-        // TODO - implement
+        mContinuationToken = in.readParcelable(
+            RcsQueryContinuationToken.class.getClassLoader());
+        mRcsThreadIds = new ArrayList<>();
+        in.readList(mRcsThreadIds, Integer.class.getClassLoader());
     }
 
     public static final Creator<RcsThreadQueryResult> CREATOR =
@@ -87,6 +111,7 @@
 
     @Override
     public void writeToParcel(Parcel dest, int flags) {
-        // TODO - implement
+        dest.writeParcelable(mContinuationToken, flags);
+        dest.writeList(mRcsThreadIds);
     }
 }
diff --git a/telephony/java/android/telephony/ims/aidl/IRcs.aidl b/telephony/java/android/telephony/ims/aidl/IRcs.aidl
index 0c958ba..a399786 100644
--- a/telephony/java/android/telephony/ims/aidl/IRcs.aidl
+++ b/telephony/java/android/telephony/ims/aidl/IRcs.aidl
@@ -16,9 +16,18 @@
 
 package android.telephony.ims.aidl;
 
-import android.telephony.ims.RcsParticipant;
-import android.telephony.ims.Rcs1To1Thread;
-import android.telephony.ims.RcsThreadQueryContinuationToken;
+import android.net.Uri;
+import android.telephony.ims.RcsEventQueryParameters;
+import android.telephony.ims.RcsEventQueryResult;
+import android.telephony.ims.RcsFileTransferCreationParameters;
+import android.telephony.ims.RcsIncomingMessageCreationParameters;
+import android.telephony.ims.RcsMessageCreationParameters;
+import android.telephony.ims.RcsMessageSnippet;
+import android.telephony.ims.RcsMessageQueryParameters;
+import android.telephony.ims.RcsMessageQueryResult;
+import android.telephony.ims.RcsParticipantQueryParameters;
+import android.telephony.ims.RcsParticipantQueryResult;
+import android.telephony.ims.RcsQueryContinuationToken;
 import android.telephony.ims.RcsThreadQueryParameters;
 import android.telephony.ims.RcsThreadQueryResult;
 
@@ -27,23 +36,231 @@
  * {@hide}
  */
 interface IRcs {
+    /////////////////////////
     // RcsMessageStore APIs
+    /////////////////////////
     RcsThreadQueryResult getRcsThreads(in RcsThreadQueryParameters queryParameters);
 
     RcsThreadQueryResult getRcsThreadsWithToken(
-        in RcsThreadQueryContinuationToken continuationToken);
+        in RcsQueryContinuationToken continuationToken);
 
-    void deleteThread(int threadId);
+    RcsParticipantQueryResult getParticipants(in RcsParticipantQueryParameters queryParameters);
 
-    Rcs1To1Thread createRcs1To1Thread(in RcsParticipant participant);
+    RcsParticipantQueryResult getParticipantsWithToken(
+        in RcsQueryContinuationToken continuationToken);
 
+    RcsMessageQueryResult getMessages(in RcsMessageQueryParameters queryParameters);
+
+    RcsMessageQueryResult getMessagesWithToken(
+        in RcsQueryContinuationToken continuationToken);
+
+    RcsEventQueryResult getEvents(in RcsEventQueryParameters queryParameters);
+
+    RcsEventQueryResult getEventsWithToken(
+        in RcsQueryContinuationToken continuationToken);
+
+    // returns true if the thread was successfully deleted
+    boolean deleteThread(int threadId, int threadType);
+
+    // Creates an Rcs1To1Thread and returns its row ID
+    int createRcs1To1Thread(int participantId);
+
+    // Creates an RcsGroupThread and returns its row ID
+    int createGroupThread(in int[] participantIds, String groupName, in Uri groupIcon);
+
+    /////////////////////////
     // RcsThread APIs
-    int getMessageCount(int rcsThreadId);
+    /////////////////////////
 
+    // Creates a new RcsIncomingMessage on the given thread and returns its row ID
+    int addIncomingMessage(int rcsThreadId,
+            in RcsIncomingMessageCreationParameters rcsIncomingMessageCreationParameters);
+
+    // Creates a new RcsOutgoingMessage on the given thread and returns its row ID
+    int addOutgoingMessage(int rcsThreadId,
+            in RcsMessageCreationParameters rcsMessageCreationParameters);
+
+    // TODO: modify RcsProvider URI's to allow deleting a message without specifying its thread
+    void deleteMessage(int rcsMessageId, boolean isIncoming, int rcsThreadId, boolean isGroup);
+
+    RcsMessageSnippet getMessageSnippet(int rcsThreadId);
+
+    /////////////////////////
+    // Rcs1To1Thread APIs
+    /////////////////////////
+    void set1To1ThreadFallbackThreadId(int rcsThreadId, long fallbackId);
+
+    long get1To1ThreadFallbackThreadId(int rcsThreadId);
+
+    int get1To1ThreadOtherParticipantId(int rcsThreadId);
+
+    /////////////////////////
+    // RcsGroupThread APIs
+    /////////////////////////
+    void setGroupThreadName(int rcsThreadId, String groupName);
+
+    String getGroupThreadName(int rcsThreadId);
+
+    void setGroupThreadIcon(int rcsThreadId, in Uri groupIcon);
+
+    Uri getGroupThreadIcon(int rcsThreadId);
+
+    void setGroupThreadOwner(int rcsThreadId, int participantId);
+
+    int getGroupThreadOwner(int rcsThreadId);
+
+    void setGroupThreadConferenceUri(int rcsThreadId, in Uri conferenceUri);
+
+    Uri getGroupThreadConferenceUri(int rcsThreadId);
+
+    void addParticipantToGroupThread(int rcsThreadId, int participantId);
+
+    void removeParticipantFromGroupThread(int rcsThreadId, int participantId);
+
+    /////////////////////////
     // RcsParticipant APIs
-    RcsParticipant createRcsParticipant(String canonicalAddress);
+    /////////////////////////
 
-    void updateRcsParticipantCanonicalAddress(int id, String canonicalAddress);
+    // Creates a new RcsParticipant and returns its rowId
+    int createRcsParticipant(String canonicalAddress, String alias);
 
-    void updateRcsParticipantAlias(int id, String alias);
+    String getRcsParticipantCanonicalAddress(int participantId);
+
+    String getRcsParticipantAlias(int participantId);
+
+    void setRcsParticipantAlias(int id, String alias);
+
+    String getRcsParticipantContactId(int participantId);
+
+    void setRcsParticipantContactId(int participantId, String contactId);
+
+    /////////////////////////
+    // RcsMessage APIs
+    /////////////////////////
+    void setMessageSubId(int messageId, boolean isIncoming, int subId);
+
+    int getMessageSubId(int messageId, boolean isIncoming);
+
+    void setMessageStatus(int messageId, boolean isIncoming, int status);
+
+    int getMessageStatus(int messageId, boolean isIncoming);
+
+    void setMessageOriginationTimestamp(int messageId, boolean isIncoming, long originationTimestamp);
+
+    long getMessageOriginationTimestamp(int messageId, boolean isIncoming);
+
+    void setGlobalMessageIdForMessage(int messageId, boolean isIncoming, String globalId);
+
+    String getGlobalMessageIdForMessage(int messageId, boolean isIncoming);
+
+    void setMessageArrivalTimestamp(int messageId, boolean isIncoming, long arrivalTimestamp);
+
+    long getMessageArrivalTimestamp(int messageId, boolean isIncoming);
+
+    void setMessageSeenTimestamp(int messageId, boolean isIncoming, long seenTimestamp);
+
+    long getMessageSeenTimestamp(int messageId, boolean isIncoming);
+
+    void setTextForMessage(int messageId, boolean isIncoming, String text);
+
+    String getTextForMessage(int messageId, boolean isIncoming);
+
+    void setLatitudeForMessage(int messageId, boolean isIncoming, double latitude);
+
+    double getLatitudeForMessage(int messageId, boolean isIncoming);
+
+    void setLongitudeForMessage(int messageId, boolean isIncoming, double longitude);
+
+    double getLongitudeForMessage(int messageId, boolean isIncoming);
+
+    // Returns the ID's of the file transfers attached to the given message
+    int[] getFileTransfersAttachedToMessage(int messageId, boolean isIncoming);
+
+    int getSenderParticipant(int messageId);
+
+    /////////////////////////
+    // RcsOutgoingMessageDelivery APIs
+    /////////////////////////
+
+    // Returns the participant ID's that this message is intended to be delivered to
+    int[] getMessageRecipients(int messageId);
+
+    long getOutgoingDeliveryDeliveredTimestamp(int messageId, int participantId);
+
+    void setOutgoingDeliveryDeliveredTimestamp(int messageId, int participantId, long deliveredTimestamp);
+
+    long getOutgoingDeliverySeenTimestamp(int messageId, int participantId);
+
+    void setOutgoingDeliverySeenTimestamp(int messageId, int participantId, long seenTimestamp);
+
+    int getOutgoingDeliveryStatus(int messageId, int participantId);
+
+    void setOutgoingDeliveryStatus(int messageId, int participantId, int status);
+
+    /////////////////////////
+    // RcsFileTransferPart APIs
+    /////////////////////////
+
+    // Performs the initial write to storage and returns the row ID.
+    int storeFileTransfer(int messageId, boolean isIncoming,
+            in RcsFileTransferCreationParameters fileTransferCreationParameters);
+
+    void deleteFileTransfer(int partId);
+
+    void setFileTransferSessionId(int partId, String sessionId);
+
+    String getFileTransferSessionId(int partId);
+
+    void setFileTransferContentUri(int partId, in Uri contentUri);
+
+    Uri getFileTransferContentUri(int partId);
+
+    void setFileTransferContentType(int partId, String contentType);
+
+    String getFileTransferContentType(int partId);
+
+    void setFileTransferFileSize(int partId, long fileSize);
+
+    long getFileTransferFileSize(int partId);
+
+    void setFileTransferTransferOffset(int partId, long transferOffset);
+
+    long getFileTransferTransferOffset(int partId);
+
+    void setFileTransferStatus(int partId, int transferStatus);
+
+    int getFileTransferStatus(int partId);
+
+    void setFileTransferWidth(int partId, int width);
+
+    int getFileTransferWidth(int partId);
+
+    void setFileTransferHeight(int partId, int height);
+
+    int getFileTransferHeight(int partId);
+
+    void setFileTransferLength(int partId, long length);
+
+    long getFileTransferLength(int partId);
+
+    void setFileTransferPreviewUri(int partId, in Uri uri);
+
+    Uri getFileTransferPreviewUri(int partId);
+
+    void setFileTransferPreviewType(int partId, String type);
+
+    String getFileTransferPreviewType(int partId);
+
+    /////////////////////////
+    // RcsEvent APIs
+    /////////////////////////
+    int createGroupThreadNameChangedEvent(long timestamp, int threadId, int originationParticipantId, String newName);
+
+    int createGroupThreadIconChangedEvent(long timestamp, int threadId, int originationParticipantId, in Uri newIcon);
+
+    int createGroupThreadParticipantJoinedEvent(long timestamp, int threadId, int originationParticipantId, int participantId);
+
+    int createGroupThreadParticipantLeftEvent(long timestamp, int threadId, int originationParticipantId, int participantId);
+
+    int createParticipantAliasChangedEvent(long timestamp, int participantId, String newAlias);
 }
\ No newline at end of file
diff --git a/telephony/java/android/telephony/mbms/GroupCallCallback.java b/telephony/java/android/telephony/mbms/GroupCallCallback.java
index 77e36bb..603f4e6 100644
--- a/telephony/java/android/telephony/mbms/GroupCallCallback.java
+++ b/telephony/java/android/telephony/mbms/GroupCallCallback.java
@@ -57,7 +57,7 @@
      * @param errorCode The error code.
      * @param message A human-readable message generated by the middleware for debugging purposes.
      */
-    void onError(@GroupCallError int errorCode, @Nullable String message);
+    default void onError(@GroupCallError int errorCode, @Nullable String message) {}
 
     /**
      * Called to indicate this call has changed state.
@@ -65,8 +65,8 @@
      * See {@link GroupCall#STATE_STOPPED}, {@link GroupCall#STATE_STARTED}
      * and {@link GroupCall#STATE_STALLED}.
      */
-    void onGroupCallStateChanged(@GroupCall.GroupCallState int state,
-            @GroupCall.GroupCallStateChangeReason int reason);
+    default void onGroupCallStateChanged(@GroupCall.GroupCallState int state,
+            @GroupCall.GroupCallStateChangeReason int reason) {}
 
     /**
      * Broadcast Signal Strength updated.
@@ -78,5 +78,6 @@
      * {@link #SIGNAL_STRENGTH_UNAVAILABLE} if broadcast is not available
      * for this call due to timing, geography or popularity.
      */
-    void onBroadcastSignalStrengthUpdated(@IntRange(from = -1, to = 4) int signalStrength);
+    default void onBroadcastSignalStrengthUpdated(
+            @IntRange(from = -1, to = 4) int signalStrength) {}
 }
diff --git a/telephony/java/android/telephony/mbms/MbmsGroupCallSessionCallback.java b/telephony/java/android/telephony/mbms/MbmsGroupCallSessionCallback.java
index 04e7ba1..ac7e172 100644
--- a/telephony/java/android/telephony/mbms/MbmsGroupCallSessionCallback.java
+++ b/telephony/java/android/telephony/mbms/MbmsGroupCallSessionCallback.java
@@ -57,7 +57,7 @@
      * @param errorCode The error code.
      * @param message A human-readable message generated by the middleware for debugging purposes.
      */
-    void onError(@GroupCallError int errorCode, @Nullable String message);
+    default void onError(@GroupCallError int errorCode, @Nullable String message) {}
 
     /**
      * Indicates that the list of currently available SAIs has been updated. The app may use this
@@ -70,8 +70,8 @@
      * @param availableSais A list of lists of available SAIS in neighboring cells, where each list
      *                      contains the available SAIs in an individual cell.
      */
-    void onAvailableSaisUpdated(@NonNull List<Integer> currentSais,
-            @NonNull List<List<Integer>> availableSais);
+    default void onAvailableSaisUpdated(@NonNull List<Integer> currentSais,
+            @NonNull List<List<Integer>> availableSais) {}
 
     /**
      * Called soon after the app calls {@link MbmsGroupCallSession#create}. The information supplied
@@ -85,7 +85,7 @@
      * @param interfaceName The interface name for the data link.
      * @param index The index for the data link.
      */
-    void onServiceInterfaceAvailable(@NonNull String interfaceName, int index);
+    default void onServiceInterfaceAvailable(@NonNull String interfaceName, int index) {}
 
     /**
      * Called to indicate that the middleware has been initialized and is ready.
@@ -95,5 +95,5 @@
      * delivered via {@link #onError(int, String)} with error code
      * {@link MbmsErrors.GeneralErrors#ERROR_MIDDLEWARE_NOT_YET_READY}.
      */
-    void onMiddlewareReady();
+    default void onMiddlewareReady() {}
 }
diff --git a/telephony/java/com/android/ims/RcsTypeIdPair.java b/telephony/java/com/android/ims/RcsTypeIdPair.java
new file mode 100644
index 0000000..a517735
--- /dev/null
+++ b/telephony/java/com/android/ims/RcsTypeIdPair.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.ims;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * A utility class to pass RCS IDs and types in RPC calls
+ *
+ * @hide
+ */
+public class RcsTypeIdPair implements Parcelable {
+    private int mType;
+    private int mId;
+
+    public RcsTypeIdPair(int type, int id) {
+        mType = type;
+        mId = id;
+    }
+
+    public int getType() {
+        return mType;
+    }
+
+    public void setType(int type) {
+        mType = type;
+    }
+
+    public int getId() {
+        return mId;
+    }
+
+    public void setId(int id) {
+        mId = id;
+    }
+
+    public RcsTypeIdPair(Parcel in) {
+        mType = in.readInt();
+        mId = in.readInt();
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(mType);
+        dest.writeInt(mId);
+    }
+
+    public static final Creator<RcsTypeIdPair> CREATOR =
+            new Creator<RcsTypeIdPair>() {
+                @Override
+                public RcsTypeIdPair createFromParcel(Parcel in) {
+                    return new RcsTypeIdPair(in);
+                }
+
+                @Override
+                public RcsTypeIdPair[] newArray(int size) {
+                    return new RcsTypeIdPair[size];
+                }
+            };
+}
diff --git a/telephony/java/com/android/internal/telephony/EncodeException.java b/telephony/java/com/android/internal/telephony/EncodeException.java
index 4e3fac1..cdc853e 100644
--- a/telephony/java/com/android/internal/telephony/EncodeException.java
+++ b/telephony/java/com/android/internal/telephony/EncodeException.java
@@ -22,6 +22,12 @@
  * {@hide}
  */
 public class EncodeException extends Exception {
+
+    private int mError = ERROR_UNENCODABLE;
+
+    public static final int ERROR_UNENCODABLE = 0;
+    public static final int ERROR_EXCEED_SIZE = 1;
+
     public EncodeException() {
         super();
     }
@@ -31,9 +37,18 @@
         super(s);
     }
 
+    public EncodeException(String s, int error) {
+        super(s);
+        mError = error;
+    }
+
     @UnsupportedAppUsage
     public EncodeException(char c) {
         super("Unencodable char: '" + c + "'");
     }
+
+    public int getError() {
+        return mError;
+    }
 }
 
diff --git a/telephony/java/com/android/internal/telephony/GsmAlphabet.java b/telephony/java/com/android/internal/telephony/GsmAlphabet.java
index 84c0e64..a774cdc 100644
--- a/telephony/java/com/android/internal/telephony/GsmAlphabet.java
+++ b/telephony/java/com/android/internal/telephony/GsmAlphabet.java
@@ -388,7 +388,7 @@
      *     GSM extension table
      * @return the encoded message
      *
-     * @throws EncodeException if String is too large to encode
+     * @throws EncodeException if String is too large to encode or any characters are unencodable
      */
     @UnsupportedAppUsage
     public static byte[] stringToGsm7BitPacked(String data, int startingSeptetOffset,
@@ -402,7 +402,8 @@
         }
         septetCount += startingSeptetOffset;
         if (septetCount > 255) {
-            throw new EncodeException("Payload cannot exceed 255 septets");
+            throw new EncodeException(
+                    "Payload cannot exceed 255 septets", EncodeException.ERROR_EXCEED_SIZE);
         }
         int byteCount = ((septetCount * 7) + 7) / 8;
         byte[] ret = new byte[byteCount + 1];  // Include space for one byte length prefix.
diff --git a/telephony/java/com/android/internal/telephony/RILConstants.java b/telephony/java/com/android/internal/telephony/RILConstants.java
index 08e30de..77b7979 100644
--- a/telephony/java/com/android/internal/telephony/RILConstants.java
+++ b/telephony/java/com/android/internal/telephony/RILConstants.java
@@ -128,32 +128,108 @@
     int OEM_ERROR_25 = 525;
 
     /* NETWORK_MODE_* See ril.h RIL_REQUEST_SET_PREFERRED_NETWORK_TYPE */
-    int NETWORK_MODE_WCDMA_PREF     = 0; /* GSM/WCDMA (WCDMA preferred) */
-    int NETWORK_MODE_GSM_ONLY       = 1; /* GSM only */
-    int NETWORK_MODE_WCDMA_ONLY     = 2; /* WCDMA only */
-    int NETWORK_MODE_GSM_UMTS       = 3; /* GSM/WCDMA (auto mode, according to PRL)
-                                            AVAILABLE Application Settings menu*/
-    int NETWORK_MODE_CDMA           = 4; /* CDMA and EvDo (auto mode, according to PRL)
-                                            AVAILABLE Application Settings menu*/
-    int NETWORK_MODE_CDMA_NO_EVDO   = 5; /* CDMA only */
-    int NETWORK_MODE_EVDO_NO_CDMA   = 6; /* EvDo only */
-    int NETWORK_MODE_GLOBAL         = 7; /* GSM/WCDMA, CDMA, and EvDo (auto mode, according to PRL)
-                                            AVAILABLE Application Settings menu*/
-    int NETWORK_MODE_LTE_CDMA_EVDO  = 8; /* LTE, CDMA and EvDo */
-    int NETWORK_MODE_LTE_GSM_WCDMA  = 9; /* LTE, GSM/WCDMA */
-    int NETWORK_MODE_LTE_CDMA_EVDO_GSM_WCDMA = 10; /* LTE, CDMA, EvDo, GSM/WCDMA */
-    int NETWORK_MODE_LTE_ONLY       = 11; /* LTE Only mode. */
-    int NETWORK_MODE_LTE_WCDMA      = 12; /* LTE/WCDMA */
-    int NETWORK_MODE_TDSCDMA_ONLY            = 13; /* TD-SCDMA only */
-    int NETWORK_MODE_TDSCDMA_WCDMA           = 14; /* TD-SCDMA and WCDMA */
-    int NETWORK_MODE_LTE_TDSCDMA             = 15; /* TD-SCDMA and LTE */
-    int NETWORK_MODE_TDSCDMA_GSM             = 16; /* TD-SCDMA and GSM */
-    int NETWORK_MODE_LTE_TDSCDMA_GSM         = 17; /* TD-SCDMA,GSM and LTE */
-    int NETWORK_MODE_TDSCDMA_GSM_WCDMA       = 18; /* TD-SCDMA, GSM/WCDMA */
-    int NETWORK_MODE_LTE_TDSCDMA_WCDMA       = 19; /* TD-SCDMA, WCDMA and LTE */
-    int NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA   = 20; /* TD-SCDMA, GSM/WCDMA and LTE */
-    int NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA  = 21; /*TD-SCDMA,EvDo,CDMA,GSM/WCDMA*/
-    int NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA = 22; /* TD-SCDMA/LTE/GSM/WCDMA, CDMA, and EvDo */
+    /** GSM, WCDMA (WCDMA preferred) */
+    int NETWORK_MODE_WCDMA_PREF = 0;
+
+    /** GSM only */
+    int NETWORK_MODE_GSM_ONLY = 1;
+
+    /** WCDMA only */
+    int NETWORK_MODE_WCDMA_ONLY = 2;
+
+    /** GSM, WCDMA (auto mode, according to PRL) */
+    int NETWORK_MODE_GSM_UMTS = 3;
+
+    /** CDMA and EvDo (auto mode, according to PRL) */
+    int NETWORK_MODE_CDMA = 4;
+
+    /** CDMA only */
+    int NETWORK_MODE_CDMA_NO_EVDO = 5;
+
+    /** EvDo only */
+    int NETWORK_MODE_EVDO_NO_CDMA = 6;
+
+    /** GSM, WCDMA, CDMA, and EvDo (auto mode, according to PRL) */
+    int NETWORK_MODE_GLOBAL = 7;
+
+    /** LTE, CDMA and EvDo */
+    int NETWORK_MODE_LTE_CDMA_EVDO = 8;
+
+    /** LTE, GSM and WCDMA */
+    int NETWORK_MODE_LTE_GSM_WCDMA = 9;
+
+    /** LTE, CDMA, EvDo, GSM, and WCDMA */
+    int NETWORK_MODE_LTE_CDMA_EVDO_GSM_WCDMA = 10;
+
+    /** LTE only mode. */
+    int NETWORK_MODE_LTE_ONLY = 11;
+
+    /** LTE and WCDMA */
+    int NETWORK_MODE_LTE_WCDMA = 12;
+
+    /** TD-SCDMA only */
+    int NETWORK_MODE_TDSCDMA_ONLY = 13;
+
+    /** TD-SCDMA and WCDMA */
+    int NETWORK_MODE_TDSCDMA_WCDMA = 14;
+
+    /** LTE and TD-SCDMA*/
+    int NETWORK_MODE_LTE_TDSCDMA = 15;
+
+    /** TD-SCDMA and GSM */
+    int NETWORK_MODE_TDSCDMA_GSM = 16;
+
+    /** TD-SCDMA, GSM and LTE */
+    int NETWORK_MODE_LTE_TDSCDMA_GSM = 17;
+
+    /** TD-SCDMA, GSM and WCDMA */
+    int NETWORK_MODE_TDSCDMA_GSM_WCDMA = 18;
+
+    /** LTE, TD-SCDMA and WCDMA */
+    int NETWORK_MODE_LTE_TDSCDMA_WCDMA = 19;
+
+    /** LTE, TD-SCDMA, GSM, and WCDMA */
+    int NETWORK_MODE_LTE_TDSCDMA_GSM_WCDMA = 20;
+
+    /** TD-SCDMA, CDMA, EVDO, GSM and WCDMA */
+    int NETWORK_MODE_TDSCDMA_CDMA_EVDO_GSM_WCDMA = 21;
+
+    /** LTE, TDCSDMA, CDMA, EVDO, GSM and WCDMA */
+    int NETWORK_MODE_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA = 22;
+
+    /** NR 5G only mode */
+    int NETWORK_MODE_NR_ONLY = 23;
+
+    /** NR 5G, LTE */
+    int NETWORK_MODE_NR_LTE = 24;
+
+    /** NR 5G, LTE, CDMA and EvDo */
+    int NETWORK_MODE_NR_LTE_CDMA_EVDO = 25;
+
+    /** NR 5G, LTE, GSM and WCDMA */
+    int NETWORK_MODE_NR_LTE_GSM_WCDMA = 26;
+
+    /** NR 5G, LTE, CDMA, EvDo, GSM and WCDMA */
+    int NETWORK_MODE_NR_LTE_CDMA_EVDO_GSM_WCDMA = 27;
+
+    /** NR 5G, LTE and WCDMA */
+    int NETWORK_MODE_NR_LTE_WCDMA = 28;
+
+    /** NR 5G, LTE and TDSCDMA */
+    int NETWORK_MODE_NR_LTE_TDSCDMA = 29;
+
+    /** NR 5G, LTE, TD-SCDMA and GSM */
+    int NETWORK_MODE_NR_LTE_TDSCDMA_GSM = 30;
+
+    /** NR 5G, LTE, TD-SCDMA, WCDMA */
+    int NETWORK_MODE_NR_LTE_TDSCDMA_WCDMA = 31;
+
+    /** NR 5G, LTE, TD-SCDMA, GSM and WCDMA */
+    int NETWORK_MODE_NR_LTE_TDSCDMA_GSM_WCDMA = 32;
+
+    /** NR 5G, LTE, TD-SCDMA, CDMA, EVDO, GSM and WCDMA */
+    int NETWORK_MODE_NR_LTE_TDSCDMA_CDMA_EVDO_GSM_WCDMA = 33;
+
     int PREFERRED_NETWORK_MODE = Integer.parseInt(TelephonyManager.getTelephonyProperty(0,
             "ro.telephony.default_network", Integer.toString(NETWORK_MODE_WCDMA_PREF)));
 
diff --git a/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java b/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
index 4f5bfa9..015efa6 100644
--- a/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
+++ b/telephony/java/com/android/internal/telephony/gsm/SmsMessage.java
@@ -384,16 +384,22 @@
                 }
             }
         } catch (EncodeException ex) {
-            // Encoding to the 7-bit alphabet failed. Let's see if we can
-            // send it as a UCS-2 encoded message
-            try {
-                userData = encodeUCS2(message, header);
-                encoding = ENCODING_16BIT;
-            } catch(UnsupportedEncodingException uex) {
-                Rlog.e(LOG_TAG,
-                        "Implausible UnsupportedEncodingException ",
-                        uex);
+            if (ex.getError() == EncodeException.ERROR_EXCEED_SIZE) {
+                Rlog.e(LOG_TAG, "Exceed size limitation EncodeException", ex);
                 return null;
+            } else {
+                // Encoding to the 7-bit alphabet failed. Let's see if we can
+                // send it as a UCS-2 encoded message
+                try {
+                    userData = encodeUCS2(message, header);
+                    encoding = ENCODING_16BIT;
+                } catch (EncodeException ex1) {
+                    Rlog.e(LOG_TAG, "Exceed size limitation EncodeException", ex1);
+                    return null;
+                } catch (UnsupportedEncodingException uex) {
+                    Rlog.e(LOG_TAG, "Implausible UnsupportedEncodingException ", uex);
+                    return null;
+                }
             }
         }
 
@@ -438,9 +444,10 @@
      *
      * @return encoded message as UCS2
      * @throws UnsupportedEncodingException
+     * @throws EncodeException if String is too large to encode
      */
     private static byte[] encodeUCS2(String message, byte[] header)
-        throws UnsupportedEncodingException {
+            throws UnsupportedEncodingException, EncodeException {
         byte[] userData, textPart;
         textPart = message.getBytes("utf-16be");
 
@@ -455,6 +462,10 @@
         else {
             userData = textPart;
         }
+        if (userData.length > 255) {
+            throw new EncodeException(
+                    "Payload cannot exceed 255 bytes", EncodeException.ERROR_EXCEED_SIZE);
+        }
         byte[] ret = new byte[userData.length+1];
         ret[0] = (byte) (userData.length & 0xff );
         System.arraycopy(userData, 0, ret, 1, userData.length);
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadIconChangedEventTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadIconChangedEventTest.java
new file mode 100644
index 0000000..915a260
--- /dev/null
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadIconChangedEventTest.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.tests.ims;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.net.Uri;
+import android.os.Parcel;
+import android.support.test.runner.AndroidJUnit4;
+import android.telephony.ims.RcsGroupThread;
+import android.telephony.ims.RcsGroupThreadIconChangedEvent;
+import android.telephony.ims.RcsParticipant;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class RcsGroupThreadIconChangedEventTest {
+
+    @Test
+    public void testCanUnparcel() {
+        RcsGroupThread rcsGroupThread = new RcsGroupThread(1);
+        RcsParticipant rcsParticipant = new RcsParticipant(2);
+        Uri newIconUri = Uri.parse("content://new_icon");
+
+        RcsGroupThreadIconChangedEvent iconChangedEvent =
+                new RcsGroupThreadIconChangedEvent(1234567890, rcsGroupThread, rcsParticipant,
+                        newIconUri);
+
+        Parcel parcel = Parcel.obtain();
+        iconChangedEvent.writeToParcel(parcel, iconChangedEvent.describeContents());
+
+        parcel.setDataPosition(0);
+
+        iconChangedEvent = RcsGroupThreadIconChangedEvent.CREATOR.createFromParcel(parcel);
+
+        assertThat(iconChangedEvent.getNewIcon()).isEqualTo(newIconUri);
+        assertThat(iconChangedEvent.getRcsGroupThread().getThreadId()).isEqualTo(1);
+        assertThat(iconChangedEvent.getOriginatingParticipant().getId()).isEqualTo(2);
+        assertThat(iconChangedEvent.getTimestamp()).isEqualTo(1234567890);
+    }
+}
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadNameChangedEventTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadNameChangedEventTest.java
new file mode 100644
index 0000000..1384c01
--- /dev/null
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadNameChangedEventTest.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.tests.ims;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+import android.support.test.runner.AndroidJUnit4;
+import android.telephony.ims.RcsGroupThread;
+import android.telephony.ims.RcsGroupThreadNameChangedEvent;
+import android.telephony.ims.RcsParticipant;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class RcsGroupThreadNameChangedEventTest {
+    @Test
+    public void testCanUnparcel() {
+        String newName = "new name";
+
+        RcsGroupThread rcsGroupThread = new RcsGroupThread(1);
+        RcsParticipant rcsParticipant = new RcsParticipant(2);
+
+        RcsGroupThreadNameChangedEvent nameChangedEvent =
+                new RcsGroupThreadNameChangedEvent(1234567890, rcsGroupThread, rcsParticipant,
+                        newName);
+
+        Parcel parcel = Parcel.obtain();
+        nameChangedEvent.writeToParcel(parcel, nameChangedEvent.describeContents());
+
+        parcel.setDataPosition(0);
+
+        nameChangedEvent = RcsGroupThreadNameChangedEvent.CREATOR.createFromParcel(
+                parcel);
+
+        assertThat(nameChangedEvent.getNewName()).isEqualTo(newName);
+        assertThat(nameChangedEvent.getRcsGroupThread().getThreadId()).isEqualTo(1);
+        assertThat(nameChangedEvent.getOriginatingParticipant().getId()).isEqualTo(2);
+        assertThat(nameChangedEvent.getTimestamp()).isEqualTo(1234567890);
+    }
+}
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadParticipantJoinedEventTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadParticipantJoinedEventTest.java
new file mode 100644
index 0000000..d0af7db
--- /dev/null
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadParticipantJoinedEventTest.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.tests.ims;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+import android.support.test.runner.AndroidJUnit4;
+import android.telephony.ims.RcsGroupThread;
+import android.telephony.ims.RcsGroupThreadParticipantJoinedEvent;
+import android.telephony.ims.RcsParticipant;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class RcsGroupThreadParticipantJoinedEventTest {
+
+    @Test
+    public void testCanUnparcel() {
+        RcsGroupThread rcsGroupThread = new RcsGroupThread(1);
+        RcsParticipant rcsParticipant = new RcsParticipant(2);
+
+        RcsGroupThreadParticipantJoinedEvent participantJoinedEvent =
+                new RcsGroupThreadParticipantJoinedEvent(1234567890, rcsGroupThread, rcsParticipant,
+                        rcsParticipant);
+
+        Parcel parcel = Parcel.obtain();
+        participantJoinedEvent.writeToParcel(parcel, participantJoinedEvent.describeContents());
+
+        parcel.setDataPosition(0);
+
+        participantJoinedEvent = RcsGroupThreadParticipantJoinedEvent.CREATOR.createFromParcel(
+                parcel);
+
+        assertThat(participantJoinedEvent.getJoinedParticipant().getId()).isEqualTo(2);
+        assertThat(participantJoinedEvent.getRcsGroupThread().getThreadId()).isEqualTo(1);
+        assertThat(participantJoinedEvent.getOriginatingParticipant().getId()).isEqualTo(2);
+        assertThat(participantJoinedEvent.getTimestamp()).isEqualTo(1234567890);
+    }
+}
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadParticipantLeftEventTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadParticipantLeftEventTest.java
new file mode 100644
index 0000000..7ba5fa6
--- /dev/null
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsGroupThreadParticipantLeftEventTest.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.tests.ims;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+import android.support.test.runner.AndroidJUnit4;
+import android.telephony.ims.RcsGroupThread;
+import android.telephony.ims.RcsGroupThreadParticipantLeftEvent;
+import android.telephony.ims.RcsParticipant;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class RcsGroupThreadParticipantLeftEventTest {
+    @Test
+    public void testCanUnparcel() {
+        RcsGroupThread rcsGroupThread = new RcsGroupThread(1);
+        RcsParticipant rcsParticipant = new RcsParticipant(2);
+
+        RcsGroupThreadParticipantLeftEvent participantLeftEvent =
+                new RcsGroupThreadParticipantLeftEvent(1234567890, rcsGroupThread, rcsParticipant,
+                        rcsParticipant);
+
+        Parcel parcel = Parcel.obtain();
+        participantLeftEvent.writeToParcel(parcel, participantLeftEvent.describeContents());
+
+        parcel.setDataPosition(0);
+
+        // create from parcel
+        parcel.setDataPosition(0);
+        participantLeftEvent = RcsGroupThreadParticipantLeftEvent.CREATOR.createFromParcel(
+                parcel);
+        assertThat(participantLeftEvent.getRcsGroupThread().getThreadId()).isEqualTo(1);
+        assertThat(participantLeftEvent.getLeavingParticipantId().getId()).isEqualTo(2);
+        assertThat(participantLeftEvent.getTimestamp()).isEqualTo(1234567890);
+    }
+}
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsMessageStoreTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsMessageStoreTest.java
deleted file mode 100644
index 44277ed..0000000
--- a/tests/RcsTests/src/com/android/tests/ims/RcsMessageStoreTest.java
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.tests.ims;
-
-import android.support.test.runner.AndroidJUnit4;
-import android.telephony.ims.RcsMessageStore;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-@RunWith(AndroidJUnit4.class)
-public class RcsMessageStoreTest {
-    //TODO(sahinc): Add meaningful tests once we have more of the implementation in place
-    @Test
-    public void testDeleteThreadDoesntCrash() {
-        RcsMessageStore mRcsMessageStore = new RcsMessageStore();
-        mRcsMessageStore.deleteThread(0);
-    }
-}
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsParticipantAliasChangedEventTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsParticipantAliasChangedEventTest.java
new file mode 100644
index 0000000..3e2bbbf
--- /dev/null
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsParticipantAliasChangedEventTest.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.tests.ims;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+import android.support.test.runner.AndroidJUnit4;
+import android.telephony.ims.RcsParticipant;
+import android.telephony.ims.RcsParticipantAliasChangedEvent;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class RcsParticipantAliasChangedEventTest {
+    private static final String OLD_ALIAS = "old alias";
+    private static final String NEW_ALIAS = "new alias";
+    private RcsParticipant mParticipant;
+
+    @Before
+    public void setUp() {
+        mParticipant = new RcsParticipant(3);
+    }
+
+    @Test
+    public void testCanUnparcel() {
+        RcsParticipantAliasChangedEvent aliasChangedEvent =
+                new RcsParticipantAliasChangedEvent(1234567890, mParticipant, NEW_ALIAS);
+
+        Parcel parcel = Parcel.obtain();
+        aliasChangedEvent.writeToParcel(parcel, aliasChangedEvent.describeContents());
+
+        parcel.setDataPosition(0);
+
+        aliasChangedEvent = RcsParticipantAliasChangedEvent.CREATOR.createFromParcel(
+                parcel);
+
+        assertThat(aliasChangedEvent.getParticipantId().getId()).isEqualTo(3);
+        assertThat(aliasChangedEvent.getNewAlias()).isEqualTo(NEW_ALIAS);
+        assertThat(aliasChangedEvent.getTimestamp()).isEqualTo(1234567890);
+    }
+}
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsParticipantQueryParametersTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsParticipantQueryParametersTest.java
new file mode 100644
index 0000000..b4bcb5d
--- /dev/null
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsParticipantQueryParametersTest.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.tests.ims;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+import android.support.test.runner.AndroidJUnit4;
+import android.telephony.ims.RcsParticipantQueryParameters;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class RcsParticipantQueryParametersTest {
+
+    @Test
+    public void testCanUnparcel() {
+        RcsParticipantQueryParameters rcsParticipantQueryParameters =
+                new RcsParticipantQueryParameters.Builder()
+                        .setAliasLike("%alias_")
+                        .setCanonicalAddressLike("_canonical%")
+                        .setSortProperty(RcsParticipantQueryParameters.SORT_BY_CANONICAL_ADDRESS)
+                        .setSortDirection(true)
+                        .setResultLimit(432)
+                        .build();
+
+
+        Parcel parcel = Parcel.obtain();
+        rcsParticipantQueryParameters.writeToParcel(parcel,
+                rcsParticipantQueryParameters.describeContents());
+
+        parcel.setDataPosition(0);
+        rcsParticipantQueryParameters = RcsParticipantQueryParameters.CREATOR.createFromParcel(
+                parcel);
+
+        assertThat(rcsParticipantQueryParameters.getAliasLike()).isEqualTo("%alias_");
+        assertThat(rcsParticipantQueryParameters.getCanonicalAddressLike()).contains("_canonical%");
+        assertThat(rcsParticipantQueryParameters.getLimit()).isEqualTo(432);
+        assertThat(rcsParticipantQueryParameters.getSortingProperty()).isEqualTo(
+                RcsParticipantQueryParameters.SORT_BY_CANONICAL_ADDRESS);
+        assertThat(rcsParticipantQueryParameters.getSortDirection()).isTrue();
+    }
+}
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsParticipantTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsParticipantTest.java
deleted file mode 100644
index c402dbf..0000000
--- a/tests/RcsTests/src/com/android/tests/ims/RcsParticipantTest.java
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.tests.ims;
-
-import static com.google.common.truth.Truth.assertThat;
-
-import android.os.Bundle;
-import android.support.test.runner.AndroidJUnit4;
-import android.telephony.ims.RcsParticipant;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-@RunWith(AndroidJUnit4.class)
-public class RcsParticipantTest {
-    private static final int ID = 123;
-    private static final String ALIAS = "alias";
-    private static final String CANONICAL_ADDRESS = "+1234567890";
-
-    @Test
-    public void testCanUnparcel() {
-        RcsParticipant rcsParticipant = new RcsParticipant(ID, CANONICAL_ADDRESS);
-        rcsParticipant.setAlias(ALIAS);
-
-        Bundle bundle = new Bundle();
-        bundle.putParcelable("Some key", rcsParticipant);
-        rcsParticipant = bundle.getParcelable("Some key");
-
-        assertThat(rcsParticipant.getId()).isEqualTo(ID);
-        assertThat(rcsParticipant.getAlias()).isEqualTo(ALIAS);
-        assertThat(rcsParticipant.getCanonicalAddress()).isEqualTo(CANONICAL_ADDRESS);
-    }
-}
diff --git a/tests/RcsTests/src/com/android/tests/ims/RcsThreadQueryParametersTest.java b/tests/RcsTests/src/com/android/tests/ims/RcsThreadQueryParametersTest.java
index a890a38..0a70eec 100644
--- a/tests/RcsTests/src/com/android/tests/ims/RcsThreadQueryParametersTest.java
+++ b/tests/RcsTests/src/com/android/tests/ims/RcsThreadQueryParametersTest.java
@@ -15,39 +15,44 @@
  */
 package com.android.tests.ims;
 
+import static android.telephony.ims.RcsThreadQueryParameters.SORT_BY_TIMESTAMP;
+import static android.telephony.ims.RcsThreadQueryParameters.THREAD_TYPE_GROUP;
+
 import static com.google.common.truth.Truth.assertThat;
 
-import android.os.Bundle;
+import android.os.Parcel;
 import android.support.test.runner.AndroidJUnit4;
 import android.telephony.ims.RcsParticipant;
 import android.telephony.ims.RcsThreadQueryParameters;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.Mock;
 
 @RunWith(AndroidJUnit4.class)
 public class RcsThreadQueryParametersTest {
-    private RcsThreadQueryParameters mRcsThreadQueryParameters;
-    @Mock RcsParticipant mMockParticipant;
 
     @Test
-    public void testUnparceling() {
-        String key = "some key";
-        mRcsThreadQueryParameters = RcsThreadQueryParameters.builder()
-                .isGroupThread(true)
-                .withParticipant(mMockParticipant)
-                .limitResultsTo(50)
-                .sort(true)
+    public void testCanUnparcel() {
+        RcsParticipant rcsParticipant = new RcsParticipant(1);
+        RcsThreadQueryParameters rcsThreadQueryParameters = new RcsThreadQueryParameters.Builder()
+                .setThreadType(THREAD_TYPE_GROUP)
+                .setParticipant(rcsParticipant)
+                .setResultLimit(50)
+                .setSortProperty(SORT_BY_TIMESTAMP)
+                .setSortDirection(true)
                 .build();
 
-        Bundle bundle = new Bundle();
-        bundle.putParcelable(key, mRcsThreadQueryParameters);
-        mRcsThreadQueryParameters = bundle.getParcelable(key);
+        Parcel parcel = Parcel.obtain();
+        rcsThreadQueryParameters.writeToParcel(parcel, rcsThreadQueryParameters.describeContents());
 
-        assertThat(mRcsThreadQueryParameters.isGroupThread()).isTrue();
-        assertThat(mRcsThreadQueryParameters.getRcsParticipants()).contains(mMockParticipant);
-        assertThat(mRcsThreadQueryParameters.getLimit()).isEqualTo(50);
-        assertThat(mRcsThreadQueryParameters.isAscending()).isTrue();
+        parcel.setDataPosition(0);
+        rcsThreadQueryParameters = RcsThreadQueryParameters.CREATOR.createFromParcel(parcel);
+
+        assertThat(rcsThreadQueryParameters.getThreadType()).isEqualTo(THREAD_TYPE_GROUP);
+        assertThat(rcsThreadQueryParameters.getRcsParticipantsIds())
+                .contains(rcsParticipant.getId());
+        assertThat(rcsThreadQueryParameters.getLimit()).isEqualTo(50);
+        assertThat(rcsThreadQueryParameters.getSortingProperty()).isEqualTo(SORT_BY_TIMESTAMP);
+        assertThat(rcsThreadQueryParameters.getSortDirection()).isTrue();
     }
 }
diff --git a/tests/net/java/android/net/LinkPropertiesTest.java b/tests/net/java/android/net/LinkPropertiesTest.java
index 299fbef..bdde096 100644
--- a/tests/net/java/android/net/LinkPropertiesTest.java
+++ b/tests/net/java/android/net/LinkPropertiesTest.java
@@ -22,18 +22,15 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.net.IpPrefix;
-import android.net.LinkAddress;
-import android.net.LinkProperties;
 import android.net.LinkProperties.CompareResult;
 import android.net.LinkProperties.ProvisioningChange;
-import android.net.RouteInfo;
-import android.os.Parcel;
 import android.support.test.filters.SmallTest;
 import android.support.test.runner.AndroidJUnit4;
 import android.system.OsConstants;
 import android.util.ArraySet;
 
+import com.android.internal.util.TestUtils;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -849,18 +846,6 @@
         assertEquals(new ArraySet<>(expectRemoved), (new ArraySet<>(result.removed)));
     }
 
-    private void assertParcelingIsLossless(LinkProperties source) {
-        Parcel p = Parcel.obtain();
-        source.writeToParcel(p, /* flags */ 0);
-        p.setDataPosition(0);
-        final byte[] marshalled = p.marshall();
-        p = Parcel.obtain();
-        p.unmarshall(marshalled, 0, marshalled.length);
-        p.setDataPosition(0);
-        LinkProperties dest = LinkProperties.CREATOR.createFromParcel(p);
-        assertEquals(source, dest);
-    }
-
     @Test
     public void testLinkPropertiesParcelable() throws Exception {
         LinkProperties source = new LinkProperties();
@@ -882,12 +867,12 @@
 
         source.setNat64Prefix(new IpPrefix("2001:db8:1:2:64:64::/96"));
 
-        assertParcelingIsLossless(source);
+        TestUtils.assertParcelingIsLossless(source, LinkProperties.CREATOR);
     }
 
     @Test
     public void testParcelUninitialized() throws Exception {
         LinkProperties empty = new LinkProperties();
-        assertParcelingIsLossless(empty);
+        TestUtils.assertParcelingIsLossless(empty, LinkProperties.CREATOR);
     }
 }
diff --git a/tests/net/java/android/net/TcpKeepalivePacketDataTest.java b/tests/net/java/android/net/TcpKeepalivePacketDataTest.java
new file mode 100644
index 0000000..1f2dd27
--- /dev/null
+++ b/tests/net/java/android/net/TcpKeepalivePacketDataTest.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+import android.net.SocketKeepalive.InvalidPacketException;
+import android.net.TcpKeepalivePacketData.TcpSocketInfo;
+
+import com.android.internal.util.TestUtils;
+
+import libcore.net.InetAddressUtils;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.net.InetAddress;
+import java.nio.ByteBuffer;
+
+@RunWith(JUnit4.class)
+public final class TcpKeepalivePacketDataTest {
+
+    @Before
+    public void setUp() {}
+
+    @Test
+    public void testV4TcpKeepalivePacket() {
+        final InetAddress srcAddr = InetAddressUtils.parseNumericAddress("192.168.0.1");
+        final InetAddress dstAddr = InetAddressUtils.parseNumericAddress("192.168.0.10");
+        final int srcPort = 1234;
+        final int dstPort = 4321;
+        final int seq = 0x11111111;
+        final int ack = 0x22222222;
+        final int wnd = 8000;
+        final int wndScale = 2;
+        TcpKeepalivePacketData resultData = null;
+        TcpSocketInfo testInfo = new TcpSocketInfo(
+                srcAddr, srcPort, dstAddr, dstPort, seq, ack, wnd, wndScale);
+        try {
+            resultData = TcpKeepalivePacketData.tcpKeepalivePacket(testInfo);
+        } catch (InvalidPacketException e) {
+            fail("InvalidPacketException: " + e);
+        }
+
+        assertEquals(testInfo.srcAddress, resultData.srcAddress);
+        assertEquals(testInfo.dstAddress, resultData.dstAddress);
+        assertEquals(testInfo.srcPort, resultData.srcPort);
+        assertEquals(testInfo.dstPort, resultData.dstPort);
+        assertEquals(testInfo.seq, resultData.tcpSeq);
+        assertEquals(testInfo.ack, resultData.tcpAck);
+        assertEquals(testInfo.rcvWndScale, resultData.tcpWndScale);
+
+        TestUtils.assertParcelingIsLossless(resultData, TcpKeepalivePacketData.CREATOR);
+
+        final byte[] packet = resultData.getPacket();
+        // IP version and TOS.
+        ByteBuffer buf = ByteBuffer.wrap(packet);
+        assertEquals(buf.getShort(), 0x4500);
+        // Source IP address.
+        byte[] ip = new byte[4];
+        buf = ByteBuffer.wrap(packet, 12, 4);
+        buf.get(ip);
+        assertArrayEquals(ip, srcAddr.getAddress());
+        // Destination IP address.
+        buf = ByteBuffer.wrap(packet, 16, 4);
+        buf.get(ip);
+        assertArrayEquals(ip, dstAddr.getAddress());
+
+        buf = ByteBuffer.wrap(packet, 20, 12);
+        // Source port.
+        assertEquals(buf.getShort(), srcPort);
+        // Destination port.
+        assertEquals(buf.getShort(), dstPort);
+        // Sequence number.
+        assertEquals(buf.getInt(), seq);
+        // Ack.
+        assertEquals(buf.getInt(), ack);
+        // Window size.
+        buf = ByteBuffer.wrap(packet, 34, 2);
+        assertEquals(buf.getShort(), wnd >> wndScale);
+    }
+
+    //TODO: add ipv6 test when ipv6 supported
+
+    @Test
+    public void testParcel() throws Exception {
+        final InetAddress srcAddr = InetAddresses.parseNumericAddress("192.168.0.1");
+        final InetAddress dstAddr = InetAddresses.parseNumericAddress("192.168.0.10");
+        final int srcPort = 1234;
+        final int dstPort = 4321;
+        final int sequence = 0x11111111;
+        final int ack = 0x22222222;
+        final int wnd = 48_000;
+        final int wndScale = 2;
+        TcpKeepalivePacketData testData = null;
+        TcpKeepalivePacketDataParcelable resultData = null;
+        TcpSocketInfo testInfo = new TcpSocketInfo(
+                srcAddr, srcPort, dstAddr, dstPort, sequence, ack, wnd, wndScale);
+        testData = TcpKeepalivePacketData.tcpKeepalivePacket(testInfo);
+        resultData = testData.toStableParcelable();
+        assertArrayEquals(resultData.srcAddress, srcAddr.getAddress());
+        assertArrayEquals(resultData.dstAddress, dstAddr.getAddress());
+        assertEquals(resultData.srcPort, srcPort);
+        assertEquals(resultData.dstPort, dstPort);
+        assertEquals(resultData.seq, sequence);
+        assertEquals(resultData.ack, ack);
+    }
+}
diff --git a/tests/net/java/com/android/internal/util/TestUtils.java b/tests/net/java/com/android/internal/util/TestUtils.java
index 6db01d3..7e5a1d3 100644
--- a/tests/net/java/com/android/internal/util/TestUtils.java
+++ b/tests/net/java/com/android/internal/util/TestUtils.java
@@ -16,12 +16,15 @@
 
 package com.android.internal.util;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
 import android.os.ConditionVariable;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Looper;
+import android.os.Parcel;
+import android.os.Parcelable;
 
 public final class TestUtils {
     private TestUtils() { }
@@ -50,4 +53,18 @@
             fail(handler.toString() + " did not become idle after " + timeoutMs + " ms");
         }
     }
+
+    // TODO : fetch the creator through reflection or something instead of passing it
+    public static <T extends Parcelable, C extends Parcelable.Creator<T>>
+            void assertParcelingIsLossless(T source, C creator) {
+        Parcel p = Parcel.obtain();
+        source.writeToParcel(p, /* flags */ 0);
+        p.setDataPosition(0);
+        final byte[] marshalled = p.marshall();
+        p = Parcel.obtain();
+        p.unmarshall(marshalled, 0, marshalled.length);
+        p.setDataPosition(0);
+        T dest = creator.createFromParcel(p);
+        assertEquals(source, dest);
+    }
 }
diff --git a/tests/net/java/com/android/server/ConnectivityServiceTest.java b/tests/net/java/com/android/server/ConnectivityServiceTest.java
index ebfb69e..1548a76 100644
--- a/tests/net/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/net/java/com/android/server/ConnectivityServiceTest.java
@@ -194,6 +194,7 @@
 import java.util.Set;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.LinkedBlockingQueue;
 import java.util.concurrent.TimeUnit;
@@ -500,17 +501,17 @@
                 public void unwanted() { mDisconnected.open(); }
 
                 @Override
-                public void startPacketKeepalive(Message msg) {
+                public void startSocketKeepalive(Message msg) {
                     int slot = msg.arg1;
                     if (mExpectedKeepaliveSlot != null) {
                         assertEquals((int) mExpectedKeepaliveSlot, slot);
                     }
-                    onPacketKeepaliveEvent(slot, mStartKeepaliveError);
+                    onSocketKeepaliveEvent(slot, mStartKeepaliveError);
                 }
 
                 @Override
-                public void stopPacketKeepalive(Message msg) {
-                    onPacketKeepaliveEvent(msg.arg1, mStopKeepaliveError);
+                public void stopSocketKeepalive(Message msg) {
+                    onSocketKeepaliveEvent(msg.arg1, mStopKeepaliveError);
                 }
 
                 @Override
@@ -3791,10 +3792,17 @@
 
     @Test
     public void testNattSocketKeepalives() throws Exception {
+        final ExecutorService executorSingleThread = Executors.newSingleThreadExecutor();
+        doTestNattSocketKeepalivesWithExecutor(executorSingleThread);
+        executorSingleThread.shutdown();
+
+        final Executor executorInline = (Runnable r) -> r.run();
+        doTestNattSocketKeepalivesWithExecutor(executorInline);
+    }
+
+    private void doTestNattSocketKeepalivesWithExecutor(Executor executor) throws Exception {
         // TODO: 1. Move this outside of ConnectivityServiceTest.
-        //       2. Add helper function to test against newSingleThreadExecutor as well as inline
-        //          executor.
-        //       3. Make test to verify that Nat-T keepalive socket is created by IpSecService.
+        //       2. Make test to verify that Nat-T keepalive socket is created by IpSecService.
         final int srcPort = 12345;
         final InetAddress myIPv4 = InetAddress.getByName("192.0.2.129");
         final InetAddress notMyIPv4 = InetAddress.getByName("192.0.2.35");
@@ -3808,8 +3816,6 @@
         final IpSecManager mIpSec = (IpSecManager) mContext.getSystemService(Context.IPSEC_SERVICE);
         final UdpEncapsulationSocket testSocket = mIpSec.openUdpEncapsulationSocket(srcPort);
 
-        final Executor executor = Executors.newSingleThreadExecutor();
-
         LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("wlan12");
         lp.addLinkAddress(new LinkAddress(myIPv6, 64));
@@ -3926,6 +3932,11 @@
 
         ka2.stop();
         callback2.expectStopped();
+
+        testSocket.close();
+        testSocket2.close();
+
+        mWiFiNetworkAgent.disconnect();
     }
 
     @Test