Merge "Move CLIENT_PROTOCOL_VERSION to point of use"
diff --git a/api/current.txt b/api/current.txt
index ce12b52..0f5f282 100755
--- a/api/current.txt
+++ b/api/current.txt
@@ -42083,7 +42083,7 @@
   }
 
   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 +43038,7 @@
     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 +43074,7 @@
     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 +43606,9 @@
   }
 
   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 +43666,10 @@
   }
 
   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/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/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/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/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/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/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index d5b543b..df1e942 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -7858,9 +7858,7 @@
      * 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();
@@ -9569,10 +9567,10 @@
      *
      * <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;
@@ -9953,12 +9951,17 @@
      * 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/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/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() {}
 }