diff --git a/api/current.txt b/api/current.txt
index b6baea9..724adac 100755
--- a/api/current.txt
+++ b/api/current.txt
@@ -41736,6 +41736,7 @@
   }
 
   public final class PhoneAccountSuggestion implements android.os.Parcelable {
+    ctor public PhoneAccountSuggestion(@NonNull android.telecom.PhoneAccountHandle, int, boolean);
     method public int describeContents();
     method @NonNull public android.telecom.PhoneAccountHandle getPhoneAccountHandle();
     method public int getReason();
@@ -42336,10 +42337,10 @@
   }
 
   public final class CellIdentityNr extends android.telephony.CellIdentity {
-    method public int getChannelNumber();
     method public String getMccString();
     method public String getMncString();
     method public long getNci();
+    method public int getNrarfcn();
     method public int getPci();
     method public int getTac();
     method public void writeToParcel(android.os.Parcel, int);
@@ -42764,7 +42765,7 @@
     method @Deprecated public int getCdmaDbm();
     method @Deprecated public int getCdmaEcio();
     method @NonNull public java.util.List<android.telephony.CellSignalStrength> getCellSignalStrengths();
-    method public <T extends android.telephony.CellSignalStrength> java.util.List<T> getCellSignalStrengths(@NonNull Class<T>);
+    method @NonNull public <T extends android.telephony.CellSignalStrength> java.util.List<T> getCellSignalStrengths(@NonNull Class<T>);
     method @Deprecated public int getEvdoDbm();
     method @Deprecated public int getEvdoEcio();
     method @Deprecated public int getEvdoSnr();
@@ -43376,7 +43377,7 @@
     method public android.telephony.data.ApnSetting.Builder setApnTypeBitmask(int);
     method public android.telephony.data.ApnSetting.Builder setAuthType(int);
     method public android.telephony.data.ApnSetting.Builder setCarrierEnabled(boolean);
-    method public android.telephony.data.ApnSetting.Builder setCarrierId(int);
+    method @NonNull public android.telephony.data.ApnSetting.Builder setCarrierId(int);
     method public android.telephony.data.ApnSetting.Builder setEntryName(String);
     method @Deprecated public android.telephony.data.ApnSetting.Builder setMmsProxyAddress(java.net.InetAddress);
     method public android.telephony.data.ApnSetting.Builder setMmsProxyAddress(String);
diff --git a/api/system-current.txt b/api/system-current.txt
index 92318d9..dcd15ce 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -3516,19 +3516,16 @@
 package android.net.util {
 
   public class SocketUtils {
-    method public static void addArpEntry(java.net.Inet4Address, android.net.MacAddress, String, java.io.FileDescriptor) throws java.io.IOException;
-    method public static void attachControlPacketFilter(java.io.FileDescriptor, int) throws java.net.SocketException;
-    method public static void attachDhcpFilter(java.io.FileDescriptor) throws java.net.SocketException;
-    method public static void attachRaFilter(java.io.FileDescriptor, int) throws java.net.SocketException;
-    method public static void bindSocket(java.io.FileDescriptor, java.net.SocketAddress) throws android.system.ErrnoException, java.net.SocketException;
-    method public static void bindSocketToInterface(java.io.FileDescriptor, String) throws android.system.ErrnoException;
-    method public static void closeSocket(java.io.FileDescriptor) throws java.io.IOException;
-    method public static void connectSocket(java.io.FileDescriptor, java.net.SocketAddress) throws android.system.ErrnoException, java.net.SocketException;
+    method public static void addArpEntry(@NonNull java.net.Inet4Address, @NonNull android.net.MacAddress, @NonNull String, @NonNull java.io.FileDescriptor) throws java.io.IOException;
+    method public static void attachControlPacketFilter(@NonNull java.io.FileDescriptor, int) throws java.net.SocketException;
+    method public static void attachDhcpFilter(@NonNull java.io.FileDescriptor) throws java.net.SocketException;
+    method public static void attachRaFilter(@NonNull java.io.FileDescriptor, int) throws java.net.SocketException;
+    method public static void bindSocketToInterface(@NonNull java.io.FileDescriptor, @NonNull String) throws android.system.ErrnoException;
+    method public static void closeSocket(@Nullable java.io.FileDescriptor) throws java.io.IOException;
     method public static java.net.SocketAddress makeNetlinkSocketAddress(int, int);
     method public static java.net.SocketAddress makePacketSocketAddress(short, int);
-    method public static java.net.SocketAddress makePacketSocketAddress(int, byte[]);
-    method public static void sendTo(java.io.FileDescriptor, byte[], int, int, int, java.net.SocketAddress) throws android.system.ErrnoException, java.net.SocketException;
-    method public static void setSocketTimeValueOption(java.io.FileDescriptor, int, int, long) throws android.system.ErrnoException;
+    method public static java.net.SocketAddress makePacketSocketAddress(int, @NonNull byte[]);
+    method public static void setSocketTimeValueOption(@NonNull java.io.FileDescriptor, int, int, long) throws android.system.ErrnoException;
   }
 
 }
@@ -5413,10 +5410,6 @@
     field public static final int CAPABILITY_MULTI_USER = 32; // 0x20
   }
 
-  public final class PhoneAccountSuggestion implements android.os.Parcelable {
-    ctor public PhoneAccountSuggestion(@NonNull android.telecom.PhoneAccountHandle, int, boolean);
-  }
-
   public class PhoneAccountSuggestionService extends android.app.Service {
     ctor public PhoneAccountSuggestionService();
     method public void onAccountSuggestionRequest(@NonNull String);
@@ -6916,7 +6909,7 @@
   public class ImsException extends java.lang.Exception {
     ctor public ImsException(@Nullable String);
     ctor public ImsException(@Nullable String, int);
-    ctor public ImsException(@Nullable String, int, Throwable);
+    ctor public ImsException(@Nullable String, int, @Nullable Throwable);
     method public int getCode();
     field public static final int CODE_ERROR_SERVICE_UNAVAILABLE = 1; // 0x1
     field public static final int CODE_ERROR_UNSPECIFIED = 0; // 0x0
@@ -6924,13 +6917,13 @@
   }
 
   public final class ImsExternalCallState implements android.os.Parcelable {
-    ctor public ImsExternalCallState(String, android.net.Uri, android.net.Uri, boolean, int, int, boolean);
+    ctor public ImsExternalCallState(@NonNull String, @NonNull android.net.Uri, @Nullable android.net.Uri, boolean, int, int, boolean);
     method public int describeContents();
-    method public android.net.Uri getAddress();
+    method @NonNull public android.net.Uri getAddress();
     method public int getCallId();
     method public int getCallState();
     method public int getCallType();
-    method public android.net.Uri getLocalAddress();
+    method @Nullable public android.net.Uri getLocalAddress();
     method public boolean isCallHeld();
     method public boolean isCallPullable();
     method public void writeToParcel(android.os.Parcel, int);
@@ -6940,7 +6933,7 @@
   }
 
   public class ImsMmTelManager {
-    method public static android.telephony.ims.ImsMmTelManager createForSubscriptionId(int);
+    method @NonNull public static android.telephony.ims.ImsMmTelManager createForSubscriptionId(int);
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public int getVoWiFiModeSetting();
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public int getVoWiFiRoamingModeSetting();
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public boolean isAdvancedCallingSettingEnabled();
@@ -6949,7 +6942,7 @@
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public boolean isVoWiFiRoamingSettingEnabled();
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public boolean isVoWiFiSettingEnabled();
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public boolean isVtSettingEnabled();
-    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public void registerImsRegistrationCallback(java.util.concurrent.Executor, @NonNull android.telephony.ims.ImsMmTelManager.RegistrationCallback) throws android.telephony.ims.ImsException;
+    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public void registerImsRegistrationCallback(@NonNull java.util.concurrent.Executor, @NonNull android.telephony.ims.ImsMmTelManager.RegistrationCallback) throws android.telephony.ims.ImsException;
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public void registerMmTelCapabilityCallback(@NonNull java.util.concurrent.Executor, @NonNull android.telephony.ims.ImsMmTelManager.CapabilityCallback) throws android.telephony.ims.ImsException;
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void setAdvancedCallingSettingEnabled(boolean);
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void setRttCapabilitySetting(boolean);
@@ -6968,15 +6961,15 @@
 
   public static class ImsMmTelManager.CapabilityCallback {
     ctor public ImsMmTelManager.CapabilityCallback();
-    method public void onCapabilitiesStatusChanged(android.telephony.ims.feature.MmTelFeature.MmTelCapabilities);
+    method public void onCapabilitiesStatusChanged(@NonNull android.telephony.ims.feature.MmTelFeature.MmTelCapabilities);
   }
 
   public static class ImsMmTelManager.RegistrationCallback {
     ctor public ImsMmTelManager.RegistrationCallback();
     method public void onRegistered(int);
     method public void onRegistering(int);
-    method public void onTechnologyChangeFailed(int, android.telephony.ims.ImsReasonInfo);
-    method public void onUnregistered(android.telephony.ims.ImsReasonInfo);
+    method public void onTechnologyChangeFailed(int, @Nullable android.telephony.ims.ImsReasonInfo);
+    method public void onUnregistered(@Nullable android.telephony.ims.ImsReasonInfo);
   }
 
   public final class ImsReasonInfo implements android.os.Parcelable {
@@ -7385,14 +7378,14 @@
   }
 
   public class ProvisioningManager {
-    method public static android.telephony.ims.ProvisioningManager createForSubscriptionId(int);
+    method @NonNull public static android.telephony.ims.ProvisioningManager createForSubscriptionId(int);
     method @WorkerThread @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public int getProvisioningIntValue(int);
-    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public boolean getProvisioningStatusForCapability(@android.telephony.ims.feature.MmTelFeature.MmTelCapabilities.MmTelCapability int, int);
-    method @WorkerThread @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public String getProvisioningStringValue(int);
-    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public void registerProvisioningChangedCallback(java.util.concurrent.Executor, @NonNull android.telephony.ims.ProvisioningManager.Callback) throws android.telephony.ims.ImsException;
+    method @WorkerThread @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public boolean getProvisioningStatusForCapability(@android.telephony.ims.feature.MmTelFeature.MmTelCapabilities.MmTelCapability int, int);
+    method @Nullable @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) @WorkerThread public String getProvisioningStringValue(int);
+    method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public void registerProvisioningChangedCallback(@NonNull java.util.concurrent.Executor, @NonNull android.telephony.ims.ProvisioningManager.Callback) throws android.telephony.ims.ImsException;
     method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) @WorkerThread public int setProvisioningIntValue(int, int);
-    method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void setProvisioningStatusForCapability(@android.telephony.ims.feature.MmTelFeature.MmTelCapabilities.MmTelCapability int, int, boolean);
-    method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) @WorkerThread public int setProvisioningStringValue(int, String);
+    method @WorkerThread @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) public void setProvisioningStatusForCapability(@android.telephony.ims.feature.MmTelFeature.MmTelCapabilities.MmTelCapability int, int, boolean);
+    method @RequiresPermission(android.Manifest.permission.MODIFY_PHONE_STATE) @WorkerThread public int setProvisioningStringValue(int, @NonNull String);
     method @RequiresPermission(android.Manifest.permission.READ_PRIVILEGED_PHONE_STATE) public void unregisterProvisioningChangedCallback(@NonNull android.telephony.ims.ProvisioningManager.Callback);
     field public static final int KEY_VOICE_OVER_WIFI_MODE_OVERRIDE = 27; // 0x1b
     field public static final int KEY_VOICE_OVER_WIFI_ROAMING_ENABLED_OVERRIDE = 26; // 0x1a
diff --git a/api/test-current.txt b/api/test-current.txt
index 08554ec..618bde8 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -917,19 +917,16 @@
 package android.net.util {
 
   public class SocketUtils {
-    method public static void addArpEntry(java.net.Inet4Address, android.net.MacAddress, String, java.io.FileDescriptor) throws java.io.IOException;
-    method public static void attachControlPacketFilter(java.io.FileDescriptor, int) throws java.net.SocketException;
-    method public static void attachDhcpFilter(java.io.FileDescriptor) throws java.net.SocketException;
-    method public static void attachRaFilter(java.io.FileDescriptor, int) throws java.net.SocketException;
-    method public static void bindSocket(java.io.FileDescriptor, java.net.SocketAddress) throws android.system.ErrnoException, java.net.SocketException;
-    method public static void bindSocketToInterface(java.io.FileDescriptor, String) throws android.system.ErrnoException;
-    method public static void closeSocket(java.io.FileDescriptor) throws java.io.IOException;
-    method public static void connectSocket(java.io.FileDescriptor, java.net.SocketAddress) throws android.system.ErrnoException, java.net.SocketException;
+    method public static void addArpEntry(@NonNull java.net.Inet4Address, @NonNull android.net.MacAddress, @NonNull String, @NonNull java.io.FileDescriptor) throws java.io.IOException;
+    method public static void attachControlPacketFilter(@NonNull java.io.FileDescriptor, int) throws java.net.SocketException;
+    method public static void attachDhcpFilter(@NonNull java.io.FileDescriptor) throws java.net.SocketException;
+    method public static void attachRaFilter(@NonNull java.io.FileDescriptor, int) throws java.net.SocketException;
+    method public static void bindSocketToInterface(@NonNull java.io.FileDescriptor, @NonNull String) throws android.system.ErrnoException;
+    method public static void closeSocket(@Nullable java.io.FileDescriptor) throws java.io.IOException;
     method public static java.net.SocketAddress makeNetlinkSocketAddress(int, int);
     method public static java.net.SocketAddress makePacketSocketAddress(short, int);
-    method public static java.net.SocketAddress makePacketSocketAddress(int, byte[]);
-    method public static void sendTo(java.io.FileDescriptor, byte[], int, int, int, java.net.SocketAddress) throws android.system.ErrnoException, java.net.SocketException;
-    method public static void setSocketTimeValueOption(java.io.FileDescriptor, int, int, long) throws android.system.ErrnoException;
+    method public static java.net.SocketAddress makePacketSocketAddress(int, @NonNull byte[]);
+    method public static void setSocketTimeValueOption(@NonNull java.io.FileDescriptor, int, int, long) throws android.system.ErrnoException;
   }
 
 }
@@ -1444,10 +1441,6 @@
     method public android.telecom.Connection getPrimaryConnection();
   }
 
-  public final class PhoneAccountSuggestion implements android.os.Parcelable {
-    ctor public PhoneAccountSuggestion(@NonNull android.telecom.PhoneAccountHandle, int, boolean);
-  }
-
   public class PhoneAccountSuggestionService extends android.app.Service {
     ctor public PhoneAccountSuggestionService();
     method public void onAccountSuggestionRequest(@NonNull String);
diff --git a/core/java/android/net/util/SocketUtils.java b/core/java/android/net/util/SocketUtils.java
index fbb15ed..5827f9e 100644
--- a/core/java/android/net/util/SocketUtils.java
+++ b/core/java/android/net/util/SocketUtils.java
@@ -19,6 +19,8 @@
 import static android.system.OsConstants.SOL_SOCKET;
 import static android.system.OsConstants.SO_BINDTODEVICE;
 
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
 import android.net.MacAddress;
@@ -49,7 +51,7 @@
      *
      * <p>Data sent through the socket will go directly to the underlying network, ignoring VPNs.
      */
-    public static void bindSocketToInterface(FileDescriptor socket, String iface)
+    public static void bindSocketToInterface(@NonNull FileDescriptor socket, @NonNull String iface)
             throws ErrnoException {
         // SO_BINDTODEVICE actually takes a string. This works because the first member
         // of struct ifreq is a NULL-terminated interface name.
@@ -75,7 +77,7 @@
     /**
      * Make a socket address that packet socket can send packets to.
      */
-    public static SocketAddress makePacketSocketAddress(int ifIndex, byte[] hwAddr) {
+    public static SocketAddress makePacketSocketAddress(int ifIndex, @NonNull byte[] hwAddr) {
         return new PacketSocketAddress(ifIndex, hwAddr);
     }
 
@@ -83,45 +85,21 @@
      * Set an option on a socket that takes a time value argument.
      */
     public static void setSocketTimeValueOption(
-            FileDescriptor fd, int level, int option, long millis) throws ErrnoException {
+            @NonNull FileDescriptor fd, int level, int option, long millis) throws ErrnoException {
         Os.setsockoptTimeval(fd, level, option, StructTimeval.fromMillis(millis));
     }
 
     /**
-     * Bind a socket to the specified address.
-     */
-    public static void bindSocket(FileDescriptor fd, SocketAddress addr)
-            throws ErrnoException, SocketException {
-        Os.bind(fd, addr);
-    }
-
-    /**
-     * Connect a socket to the specified address.
-     */
-    public static void connectSocket(FileDescriptor fd, SocketAddress addr)
-            throws ErrnoException, SocketException {
-        Os.connect(fd, addr);
-    }
-
-    /**
-     * Send a message on a socket, using the specified SocketAddress.
-     */
-    public static void sendTo(FileDescriptor fd, byte[] bytes, int byteOffset, int byteCount,
-            int flags, SocketAddress addr) throws ErrnoException, SocketException {
-        Os.sendto(fd, bytes, byteOffset, byteCount, flags, addr);
-    }
-
-    /**
      * @see IoBridge#closeAndSignalBlockedThreads(FileDescriptor)
      */
-    public static void closeSocket(FileDescriptor fd) throws IOException {
+    public static void closeSocket(@Nullable FileDescriptor fd) throws IOException {
         IoBridge.closeAndSignalBlockedThreads(fd);
     }
 
     /**
      * Attaches a socket filter that accepts DHCP packets to the given socket.
      */
-    public static void attachDhcpFilter(FileDescriptor fd) throws SocketException {
+    public static void attachDhcpFilter(@NonNull FileDescriptor fd) throws SocketException {
         NetworkUtils.attachDhcpFilter(fd);
     }
 
@@ -130,7 +108,8 @@
      * @param fd the socket's {@link FileDescriptor}.
      * @param packetType the hardware address type, one of ARPHRD_*.
      */
-    public static void attachRaFilter(FileDescriptor fd, int packetType) throws SocketException {
+    public static void attachRaFilter(@NonNull FileDescriptor fd, int packetType)
+            throws SocketException {
         NetworkUtils.attachRaFilter(fd, packetType);
     }
 
@@ -142,7 +121,7 @@
      * @param fd the socket's {@link FileDescriptor}.
      * @param packetType the hardware address type, one of ARPHRD_*.
      */
-    public static void attachControlPacketFilter(FileDescriptor fd, int packetType)
+    public static void attachControlPacketFilter(@NonNull FileDescriptor fd, int packetType)
             throws SocketException {
         NetworkUtils.attachControlPacketFilter(fd, packetType);
     }
@@ -150,8 +129,8 @@
     /**
      * Add an entry into the ARP cache.
      */
-    public static void addArpEntry(Inet4Address ipv4Addr, MacAddress ethAddr, String ifname,
-            FileDescriptor fd) throws IOException {
+    public static void addArpEntry(@NonNull Inet4Address ipv4Addr, @NonNull MacAddress ethAddr,
+            @NonNull String ifname, @NonNull FileDescriptor fd) throws IOException {
         NetworkUtils.addArpEntry(ipv4Addr, ethAddr, ifname, fd);
     }
 
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index e40d97b..35bc46a 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -1839,12 +1839,12 @@
 
     <!-- Must be required by a {@link android.telecom.PhoneAccountSuggestionService},
          to ensure that only the system can bind to it.
-         <p>Protection level: signature|privileged
+         <p>Protection level: signature
          @SystemApi
          @hide
     -->
     <permission android:name="android.permission.BIND_PHONE_ACCOUNT_SUGGESTION_SERVICE"
-        android:protectionLevel="signature|privileged" />
+        android:protectionLevel="signature" />
 
     <!-- Must be required by a {@link android.telecom.CallRedirectionService},
          to ensure that only the system can bind to it.
diff --git a/packages/NetworkStack/src/android/net/apf/ApfFilter.java b/packages/NetworkStack/src/android/net/apf/ApfFilter.java
index 923f162..3dd90ee 100644
--- a/packages/NetworkStack/src/android/net/apf/ApfFilter.java
+++ b/packages/NetworkStack/src/android/net/apf/ApfFilter.java
@@ -475,7 +475,7 @@
             socket = Os.socket(AF_PACKET, SOCK_RAW, ETH_P_IPV6);
             SocketAddress addr = makePacketSocketAddress(
                     (short) ETH_P_IPV6, mInterfaceParams.index);
-            SocketUtils.bindSocket(socket, addr);
+            Os.bind(socket, addr);
             SocketUtils.attachRaFilter(socket, mApfCapabilities.apfPacketFormat);
         } catch(SocketException|ErrnoException e) {
             Log.e(TAG, "Error starting filter", e);
diff --git a/packages/NetworkStack/src/android/net/dhcp/DhcpClient.java b/packages/NetworkStack/src/android/net/dhcp/DhcpClient.java
index b0e8da9..0b7809e 100644
--- a/packages/NetworkStack/src/android/net/dhcp/DhcpClient.java
+++ b/packages/NetworkStack/src/android/net/dhcp/DhcpClient.java
@@ -317,7 +317,7 @@
         try {
             mPacketSock = Os.socket(AF_PACKET, SOCK_RAW, ETH_P_IP);
             SocketAddress addr = makePacketSocketAddress((short) ETH_P_IP, mIface.index);
-            SocketUtils.bindSocket(mPacketSock, addr);
+            Os.bind(mPacketSock, addr);
             SocketUtils.attachDhcpFilter(mPacketSock);
         } catch(SocketException|ErrnoException e) {
             Log.e(TAG, "Error creating packet socket", e);
@@ -412,8 +412,7 @@
         try {
             if (encap == DhcpPacket.ENCAP_L2) {
                 if (DBG) Log.d(TAG, "Broadcasting " + description);
-                SocketUtils.sendTo(
-                        mPacketSock, buf.array(), 0, buf.limit(), 0, mInterfaceBroadcastAddr);
+                Os.sendto(mPacketSock, buf.array(), 0, buf.limit(), 0, mInterfaceBroadcastAddr);
             } else if (encap == DhcpPacket.ENCAP_BOOTP && to.equals(INADDR_BROADCAST)) {
                 if (DBG) Log.d(TAG, "Broadcasting " + description);
                 // We only send L3-encapped broadcasts in DhcpRebindingState,
diff --git a/packages/NetworkStack/src/android/net/ip/ConnectivityPacketTracker.java b/packages/NetworkStack/src/android/net/ip/ConnectivityPacketTracker.java
index 649257a..de54824 100644
--- a/packages/NetworkStack/src/android/net/ip/ConnectivityPacketTracker.java
+++ b/packages/NetworkStack/src/android/net/ip/ConnectivityPacketTracker.java
@@ -104,8 +104,7 @@
             try {
                 s = Os.socket(AF_PACKET, SOCK_RAW | SOCK_NONBLOCK, 0);
                 SocketUtils.attachControlPacketFilter(s, ARPHRD_ETHER);
-                SocketUtils.bindSocket(
-                        s, makePacketSocketAddress((short) ETH_P_ALL, mInterface.index));
+                Os.bind(s, makePacketSocketAddress((short) ETH_P_ALL, mInterface.index));
             } catch (ErrnoException | IOException e) {
                 logError("Failed to create packet tracking socket: ", e);
                 closeFd(s);
diff --git a/packages/NetworkStack/src/android/net/ip/IpNeighborMonitor.java b/packages/NetworkStack/src/android/net/ip/IpNeighborMonitor.java
index b29d617..6ae9a2b 100644
--- a/packages/NetworkStack/src/android/net/ip/IpNeighborMonitor.java
+++ b/packages/NetworkStack/src/android/net/ip/IpNeighborMonitor.java
@@ -34,7 +34,6 @@
 import android.net.util.NetworkStackUtils;
 import android.net.util.PacketReader;
 import android.net.util.SharedLog;
-import android.net.util.SocketUtils;
 import android.os.Handler;
 import android.os.SystemClock;
 import android.system.ErrnoException;
@@ -150,7 +149,7 @@
 
         try {
             fd = Os.socket(AF_NETLINK, SOCK_DGRAM | SOCK_NONBLOCK, NETLINK_ROUTE);
-            SocketUtils.bindSocket(fd, makeNetlinkSocketAddress(0, OsConstants.RTMGRP_NEIGH));
+            Os.bind(fd, makeNetlinkSocketAddress(0, OsConstants.RTMGRP_NEIGH));
             NetlinkSocket.connectToKernel(fd);
 
             if (VDBG) {
diff --git a/services/core/java/com/android/server/TelephonyRegistry.java b/services/core/java/com/android/server/TelephonyRegistry.java
index d8a54f7..84d6154 100644
--- a/services/core/java/com/android/server/TelephonyRegistry.java
+++ b/services/core/java/com/android/server/TelephonyRegistry.java
@@ -1549,6 +1549,13 @@
                 log("notifyPreciseCallState: mCallQuality is null, skipping call attributes");
                 notifyCallAttributes = false;
             } else {
+                // If the precise call state is no longer active, reset the call network type and
+                // call quality.
+                if (mPreciseCallState.getForegroundCallState()
+                        != PreciseCallState.PRECISE_CALL_STATE_ACTIVE) {
+                    mCallNetworkType = TelephonyManager.NETWORK_TYPE_UNKNOWN;
+                    mCallQuality = new CallQuality();
+                }
                 mCallAttributes = new CallAttributes(mPreciseCallState, mCallNetworkType,
                         mCallQuality);
             }
diff --git a/services/net/java/android/net/netlink/NetlinkSocket.java b/services/net/java/android/net/netlink/NetlinkSocket.java
index 16f72bd..4240d24 100644
--- a/services/net/java/android/net/netlink/NetlinkSocket.java
+++ b/services/net/java/android/net/netlink/NetlinkSocket.java
@@ -109,7 +109,7 @@
     }
 
     public static void connectToKernel(FileDescriptor fd) throws ErrnoException, SocketException {
-        SocketUtils.connectSocket(fd, makeNetlinkSocketAddress(0, 0));
+        Os.connect(fd, makeNetlinkSocketAddress(0, 0));
     }
 
     private static void checkTimeout(long timeoutMs) {
diff --git a/telecomm/java/android/telecom/PhoneAccountSuggestion.java b/telecomm/java/android/telecom/PhoneAccountSuggestion.java
index f23f4c9..563c2dc 100644
--- a/telecomm/java/android/telecom/PhoneAccountSuggestion.java
+++ b/telecomm/java/android/telecom/PhoneAccountSuggestion.java
@@ -18,8 +18,6 @@
 
 import android.annotation.IntDef;
 import android.annotation.NonNull;
-import android.annotation.SystemApi;
-import android.annotation.TestApi;
 import android.os.Parcel;
 import android.os.Parcelable;
 
@@ -69,10 +67,15 @@
     private boolean mShouldAutoSelect;
 
     /**
-     * @hide
+     * Creates a new instance of {@link PhoneAccountSuggestion}. This constructor is intended for
+     * use by apps implementing a {@link PhoneAccountSuggestionService}, and generally should not be
+     * used by dialer apps other than for testing purposes.
+     *
+     * @param handle The {@link PhoneAccountHandle} for this suggestion.
+     * @param reason The reason for this suggestion
+     * @param shouldAutoSelect Whether the dialer should automatically place the call using this
+     *                         account. See {@link #shouldAutoSelect()}.
      */
-    @SystemApi
-    @TestApi
     public PhoneAccountSuggestion(@NonNull PhoneAccountHandle handle, @SuggestionReason int reason,
             boolean shouldAutoSelect) {
         this.mHandle = handle;
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 94a755c..ee69dad 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -2437,6 +2437,32 @@
     public static final String KEY_CDMA_ENHANCED_ROAMING_INDICATOR_FOR_HOME_NETWORK_INT_ARRAY =
             "cdma_enhanced_roaming_indicator_for_home_network_int_array";
 
+    /**
+     * This configuration allow the system UI to display different 5G icon for different 5G status.
+     *
+     * There are four 5G status:
+     * 1. connected_mmwave: device currently connected to 5G cell as the secondary cell and using
+     *    millimeter wave.
+     * 2. connected: device currently connected to 5G cell as the secondary cell but not using
+     *    millimeter wave.
+     * 3. not_restricted: device camped on a network that has 5G capability(not necessary to connect
+     *    a 5G cell as a secondary cell) and the use of 5G is not restricted.
+     * 4. restricted: device camped on a network that has 5G capability(not necessary to connect a
+     *    5G cell as a secondary cell) but the use of 5G is restricted.
+     *
+     * The configured string contains multiple key-value pairs separated by comma. For each pair,
+     * the key and value is separated by a colon. The key is corresponded to a 5G status above and
+     * the value is the icon name. Use "None" as the icon name if no icon should be shown in a
+     * specific 5G status.
+     *
+     * Here is an example of the configuration:
+     * "connected_mmwave:5GPlus,connected:5G,not_restricted:None,restricted:None"
+     *
+     * @hide
+     */
+    public static final String KEY_5G_ICON_CONFIGURATION_STRING =
+            "5g_icon_configuration_string";
+
     /** The default value for every variable. */
     private final static PersistableBundle sDefaults;
 
@@ -2817,6 +2843,8 @@
                 new int[] {
                         1 /* Roaming Indicator Off */
                 });
+        sDefaults.putString(KEY_5G_ICON_CONFIGURATION_STRING,
+                "connected_mmwave:None,connected:5G,not_restricted:None,restricted:None");
     }
 
     /**
diff --git a/telephony/java/android/telephony/CellIdentityNr.java b/telephony/java/android/telephony/CellIdentityNr.java
index 19bc0ce..b94ca9b 100644
--- a/telephony/java/android/telephony/CellIdentityNr.java
+++ b/telephony/java/android/telephony/CellIdentityNr.java
@@ -89,11 +89,14 @@
     }
 
     /**
-     * Get the Absolute Radio Frequency Channel Number.
+     * Get the New Radio Absolute Radio Frequency Channel Number.
+     *
+     * Reference: 3GPP TS 38.101-1 section 5.4.2.1 NR-ARFCN and channel raster.
+     * Reference: 3GPP TS 38.101-2 section 5.4.2.1 NR-ARFCN and channel raster.
+     *
      * @return Integer value in range [0, 3279165] or {@link CellInfo#UNAVAILABLE} if unknown.
      */
-    @Override
-    public int getChannelNumber() {
+    public int getNrarfcn() {
         return mNrArfcn;
     }
 
diff --git a/telephony/java/android/telephony/SignalStrength.java b/telephony/java/android/telephony/SignalStrength.java
index d461bd0..cab2374 100644
--- a/telephony/java/android/telephony/SignalStrength.java
+++ b/telephony/java/android/telephony/SignalStrength.java
@@ -214,7 +214,7 @@
      * @see android.telephony#CellSignalStrengthCdma
      * @see android.telephony#CellSignalStrengthGsm
      */
-    public @NonNull List<CellSignalStrength> getCellSignalStrengths() {
+    @NonNull public List<CellSignalStrength> getCellSignalStrengths() {
         return getCellSignalStrengths(CellSignalStrength.class);
     }
 
@@ -240,7 +240,7 @@
      * @see android.telephony#CellSignalStrengthCdma
      * @see android.telephony#CellSignalStrengthGsm
      */
-    public <T extends CellSignalStrength> @NonNull List<T> getCellSignalStrengths(
+    @NonNull public <T extends CellSignalStrength> List<T> getCellSignalStrengths(
             @NonNull Class<T> clazz) {
         List<T> cssList = new ArrayList<>(2); // Usually have 2 or fewer elems
         if (mLte.isValid() && clazz.isAssignableFrom(CellSignalStrengthLte.class)) {
diff --git a/telephony/java/android/telephony/data/ApnSetting.java b/telephony/java/android/telephony/data/ApnSetting.java
index c802e63..1607817 100644
--- a/telephony/java/android/telephony/data/ApnSetting.java
+++ b/telephony/java/android/telephony/data/ApnSetting.java
@@ -1868,6 +1868,7 @@
          *
          * @param carrierId the carrier id to set for this APN
          */
+        @NonNull
         public Builder setCarrierId(int carrierId) {
             this.mCarrierId = carrierId;
             return this;
diff --git a/telephony/java/android/telephony/ims/ImsException.java b/telephony/java/android/telephony/ims/ImsException.java
index ac4d17a..bdaad5b 100644
--- a/telephony/java/android/telephony/ims/ImsException.java
+++ b/telephony/java/android/telephony/ims/ImsException.java
@@ -86,7 +86,8 @@
      * @param message an optional message to detail the error condition more specifically.
      * @param cause the {@link Throwable} that caused this {@link ImsException} to be created.
      */
-    public ImsException(@Nullable String message, @ImsErrorCode  int code, Throwable cause) {
+    public ImsException(@Nullable String message, @ImsErrorCode  int code,
+            @Nullable Throwable cause) {
         super(getMessage(message, code), cause);
         mCode = code;
     }
diff --git a/telephony/java/android/telephony/ims/ImsExternalCallState.java b/telephony/java/android/telephony/ims/ImsExternalCallState.java
index f2d0cbf..c56915d 100644
--- a/telephony/java/android/telephony/ims/ImsExternalCallState.java
+++ b/telephony/java/android/telephony/ims/ImsExternalCallState.java
@@ -17,6 +17,8 @@
 package android.telephony.ims;
 
 import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.net.Uri;
 import android.os.Parcel;
@@ -124,9 +126,9 @@
      * @param callType The type of external call.
      * @param isCallheld A flag determining if the external connection is currently held.
      */
-    public ImsExternalCallState(String callId, Uri address, Uri localAddress,
-            boolean isPullable, @ExternalCallState int callState, @ExternalCallType int callType,
-            boolean isCallheld) {
+    public ImsExternalCallState(@NonNull String callId, @NonNull Uri address,
+            @Nullable Uri localAddress, boolean isPullable, @ExternalCallState int callState,
+            @ExternalCallType int callType, boolean isCallheld) {
         mCallId = getIdForString(callId);
         mAddress = address;
         mLocalAddress = localAddress;
@@ -184,14 +186,14 @@
         return mCallId;
     }
 
-    public Uri getAddress() {
+    public @NonNull Uri getAddress() {
         return mAddress;
     }
 
     /**
      * @return A {@link Uri} containing the local address from the Multiendpoint Dialog Information.
      */
-    public Uri getLocalAddress() {
+    public @Nullable Uri getLocalAddress() {
         return mLocalAddress;
     }
 
diff --git a/telephony/java/android/telephony/ims/ImsMmTelManager.java b/telephony/java/android/telephony/ims/ImsMmTelManager.java
index bb85be1..58ddf21 100644
--- a/telephony/java/android/telephony/ims/ImsMmTelManager.java
+++ b/telephony/java/android/telephony/ims/ImsMmTelManager.java
@@ -21,6 +21,7 @@
 import android.annotation.CallbackExecutor;
 import android.annotation.IntDef;
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
 import android.content.Context;
@@ -199,7 +200,7 @@
          *
          * @param info the {@link ImsReasonInfo} associated with why registration was disconnected.
          */
-        public void onUnregistered(ImsReasonInfo info) {
+        public void onUnregistered(@Nullable ImsReasonInfo info) {
         }
 
         /**
@@ -211,7 +212,7 @@
          *         transport type that has failed to handover registration to.
          * @param info A {@link ImsReasonInfo} that identifies the reason for failure.
          */
-        public void onTechnologyChangeFailed(int imsTransportType, ImsReasonInfo info) {
+        public void onTechnologyChangeFailed(int imsTransportType, @Nullable ImsReasonInfo info) {
         }
 
         /**
@@ -223,7 +224,7 @@
          *         subscription.
          * @hide
          */
-        public void onSubscriberAssociatedUriChanged(Uri[] uris) {
+        public void onSubscriberAssociatedUriChanged(@Nullable Uri[] uris) {
         }
 
         /**@hide*/
@@ -294,7 +295,7 @@
          * @param capabilities The new availability of the capabilities.
          */
         public void onCapabilitiesStatusChanged(
-                MmTelFeature.MmTelCapabilities capabilities) {
+                @NonNull MmTelFeature.MmTelCapabilities capabilities) {
         }
 
         /**@hide*/
@@ -319,7 +320,7 @@
      * @see android.telephony.SubscriptionManager#getActiveSubscriptionInfoList()
      * @throws IllegalArgumentException if the subscription is invalid.
      */
-    public static ImsMmTelManager createForSubscriptionId(int subId) {
+    public static @NonNull ImsMmTelManager createForSubscriptionId(int subId) {
         if (!SubscriptionManager.isValidSubscriptionId(subId)) {
             throw new IllegalArgumentException("Invalid subscription ID");
         }
@@ -357,7 +358,7 @@
      * reason.
      */
     @RequiresPermission(Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
-    public void registerImsRegistrationCallback(@CallbackExecutor Executor executor,
+    public void registerImsRegistrationCallback(@NonNull @CallbackExecutor Executor executor,
             @NonNull RegistrationCallback c) throws ImsException {
         if (c == null) {
             throw new IllegalArgumentException("Must include a non-null RegistrationCallback.");
diff --git a/telephony/java/android/telephony/ims/ProvisioningManager.java b/telephony/java/android/telephony/ims/ProvisioningManager.java
index 204891b..9104d9f 100644
--- a/telephony/java/android/telephony/ims/ProvisioningManager.java
+++ b/telephony/java/android/telephony/ims/ProvisioningManager.java
@@ -19,6 +19,7 @@
 import android.Manifest;
 import android.annotation.CallbackExecutor;
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
 import android.annotation.SystemApi;
 import android.annotation.WorkerThread;
@@ -177,7 +178,7 @@
      * @see android.telephony.SubscriptionManager#getActiveSubscriptionInfoList()
      * @throws IllegalArgumentException if the subscription is invalid.
      */
-    public static ProvisioningManager createForSubscriptionId(int subId) {
+    public static @NonNull ProvisioningManager createForSubscriptionId(int subId) {
         if (!SubscriptionManager.isValidSubscriptionId(subId)) {
             throw new IllegalArgumentException("Invalid subscription ID");
         }
@@ -206,7 +207,7 @@
      * reason.
      */
     @RequiresPermission(Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
-    public void registerProvisioningChangedCallback(@CallbackExecutor Executor executor,
+    public void registerProvisioningChangedCallback(@NonNull @CallbackExecutor Executor executor,
             @NonNull Callback callback) throws ImsException {
         callback.setExecutor(executor);
         try {
@@ -271,7 +272,7 @@
      */
     @WorkerThread
     @RequiresPermission(Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
-    public String getProvisioningStringValue(int key) {
+    public @Nullable String getProvisioningStringValue(int key) {
         try {
             return getITelephony().getImsProvisioningString(mSubId, key);
         } catch (RemoteException e) {
@@ -313,7 +314,7 @@
     @WorkerThread
     @RequiresPermission(Manifest.permission.MODIFY_PHONE_STATE)
     public @ImsConfigImplBase.SetConfigResult int setProvisioningStringValue(int key,
-            String value) {
+            @NonNull String value) {
         try {
             return getITelephony().setImsProvisioningString(mSubId, key, value);
         } catch (RemoteException e) {
@@ -333,6 +334,7 @@
      * @see CarrierConfigManager#KEY_CARRIER_VOLTE_PROVISIONING_REQUIRED_BOOL
      * @param isProvisioned true if the device is provisioned for UT over IMS, false otherwise.
      */
+    @WorkerThread
     @RequiresPermission(Manifest.permission.MODIFY_PHONE_STATE)
     public void setProvisioningStatusForCapability(
             @MmTelFeature.MmTelCapabilities.MmTelCapability int capability,
@@ -359,6 +361,7 @@
      * provisioning, false if the capability does require provisioning and has not been
      * provisioned yet.
      */
+    @WorkerThread
     @RequiresPermission(Manifest.permission.READ_PRIVILEGED_PHONE_STATE)
     public boolean getProvisioningStatusForCapability(
             @MmTelFeature.MmTelCapabilities.MmTelCapability int capability,
diff --git a/tests/net/Android.mk b/tests/net/Android.mk
index 7e1b400..2ef141f 100644
--- a/tests/net/Android.mk
+++ b/tests/net/Android.mk
@@ -14,7 +14,7 @@
 LOCAL_STATIC_JAVA_LIBRARIES := \
     frameworks-base-testutils \
     framework-protos \
-    android-support-test \
+    androidx.test.rules \
     mockito-target-minus-junit4 \
     platform-test-annotations \
     services.core \
diff --git a/tests/net/AndroidManifest.xml b/tests/net/AndroidManifest.xml
index 6dae3f1..dcacb6d 100644
--- a/tests/net/AndroidManifest.xml
+++ b/tests/net/AndroidManifest.xml
@@ -51,7 +51,7 @@
     </application>
 
     <instrumentation
-        android:name="android.support.test.runner.AndroidJUnitRunner"
+        android:name="androidx.test.runner.AndroidJUnitRunner"
         android:targetPackage="com.android.frameworks.tests.net"
         android:label="Frameworks Networking Tests" />
 </manifest>
diff --git a/tests/net/AndroidTest.xml b/tests/net/AndroidTest.xml
index 6e020a3..939ae49 100644
--- a/tests/net/AndroidTest.xml
+++ b/tests/net/AndroidTest.xml
@@ -22,7 +22,7 @@
     <option name="test-tag" value="FrameworksNetTests" />
     <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
         <option name="package" value="com.android.frameworks.tests.net" />
-        <option name="runner" value="android.support.test.runner.AndroidJUnitRunner" />
+        <option name="runner" value="androidx.test.runner.AndroidJUnitRunner" />
         <option name="hidden-api-checks" value="false"/>
     </test>
 </configuration>
diff --git a/tests/net/java/android/app/usage/NetworkStatsManagerTest.java b/tests/net/java/android/app/usage/NetworkStatsManagerTest.java
index 25e1474..fd555c1 100644
--- a/tests/net/java/android/app/usage/NetworkStatsManagerTest.java
+++ b/tests/net/java/android/app/usage/NetworkStatsManagerTest.java
@@ -26,7 +26,6 @@
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.argThat;
 import static org.mockito.ArgumentMatchers.eq;
-import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -38,9 +37,10 @@
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.os.RemoteException;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/ConnectivityManagerTest.java b/tests/net/java/android/net/ConnectivityManagerTest.java
index 6174c6c..7ede144 100644
--- a/tests/net/java/android/net/ConnectivityManagerTest.java
+++ b/tests/net/java/android/net/ConnectivityManagerTest.java
@@ -34,7 +34,6 @@
 
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.mockito.Mockito.any;
@@ -47,19 +46,20 @@
 import static org.mockito.Mockito.when;
 
 import android.app.PendingIntent;
-import android.net.ConnectivityManager;
-import android.net.NetworkCapabilities;
 import android.content.Context;
+import android.content.pm.ApplicationInfo;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
+import android.net.NetworkCapabilities;
+import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
 import android.os.Messenger;
-import android.content.pm.ApplicationInfo;
-import android.os.Build.VERSION_CODES;
-import android.net.ConnectivityManager.NetworkCallback;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/DnsPacketTest.java b/tests/net/java/android/net/DnsPacketTest.java
index 032e526..91ff6b3 100644
--- a/tests/net/java/android/net/DnsPacketTest.java
+++ b/tests/net/java/android/net/DnsPacketTest.java
@@ -20,8 +20,8 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/IpMemoryStoreTest.java b/tests/net/java/android/net/IpMemoryStoreTest.java
index eae9710..57ecc8f 100644
--- a/tests/net/java/android/net/IpMemoryStoreTest.java
+++ b/tests/net/java/android/net/IpMemoryStoreTest.java
@@ -17,8 +17,9 @@
 package android.net;
 
 import android.content.Context;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/IpPrefixTest.java b/tests/net/java/android/net/IpPrefixTest.java
index 1f1ba2e..3cc0e36 100644
--- a/tests/net/java/android/net/IpPrefixTest.java
+++ b/tests/net/java/android/net/IpPrefixTest.java
@@ -25,15 +25,16 @@
 import static org.junit.Assert.fail;
 
 import android.os.Parcel;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import java.net.InetAddress;
 import java.util.Random;
 
-import org.junit.runner.RunWith;
-import org.junit.Test;
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class IpPrefixTest {
diff --git a/tests/net/java/android/net/IpSecAlgorithmTest.java b/tests/net/java/android/net/IpSecAlgorithmTest.java
index 85e8361..8e9d08c 100644
--- a/tests/net/java/android/net/IpSecAlgorithmTest.java
+++ b/tests/net/java/android/net/IpSecAlgorithmTest.java
@@ -20,17 +20,18 @@
 import static org.junit.Assert.fail;
 
 import android.os.Parcel;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import java.util.AbstractMap.SimpleEntry;
 import java.util.Arrays;
 import java.util.Map.Entry;
 import java.util.Random;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 /** Unit tests for {@link IpSecAlgorithm}. */
 @SmallTest
 @RunWith(AndroidJUnit4.class)
diff --git a/tests/net/java/android/net/IpSecConfigTest.java b/tests/net/java/android/net/IpSecConfigTest.java
index be1a455..215506c 100644
--- a/tests/net/java/android/net/IpSecConfigTest.java
+++ b/tests/net/java/android/net/IpSecConfigTest.java
@@ -22,7 +22,8 @@
 import static org.junit.Assert.assertTrue;
 
 import android.os.Parcel;
-import android.support.test.filters.SmallTest;
+
+import androidx.test.filters.SmallTest;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/IpSecManagerTest.java b/tests/net/java/android/net/IpSecManagerTest.java
index 8160924..730e2d5 100644
--- a/tests/net/java/android/net/IpSecManagerTest.java
+++ b/tests/net/java/android/net/IpSecManagerTest.java
@@ -19,6 +19,7 @@
 import static android.system.OsConstants.AF_INET;
 import static android.system.OsConstants.IPPROTO_UDP;
 import static android.system.OsConstants.SOCK_DGRAM;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
@@ -30,21 +31,22 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
-import android.test.mock.MockContext;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.system.Os;
+import android.test.mock.MockContext;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.server.IpSecService;
 
-import java.net.InetAddress;
-import java.net.Socket;
-import java.net.UnknownHostException;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.net.InetAddress;
+import java.net.Socket;
+import java.net.UnknownHostException;
+
 /** Unit tests for {@link IpSecManager}. */
 @SmallTest
 @RunWith(AndroidJUnit4.class)
diff --git a/tests/net/java/android/net/IpSecTransformTest.java b/tests/net/java/android/net/IpSecTransformTest.java
index ffd1f06..2308a3c 100644
--- a/tests/net/java/android/net/IpSecTransformTest.java
+++ b/tests/net/java/android/net/IpSecTransformTest.java
@@ -19,7 +19,7 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
+import androidx.test.filters.SmallTest;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/LinkAddressTest.java b/tests/net/java/android/net/LinkAddressTest.java
index c1ad946..be7bd1b 100644
--- a/tests/net/java/android/net/LinkAddressTest.java
+++ b/tests/net/java/android/net/LinkAddressTest.java
@@ -26,6 +26,7 @@
 import static android.system.OsConstants.RT_SCOPE_LINK;
 import static android.system.OsConstants.RT_SCOPE_SITE;
 import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotEquals;
@@ -33,24 +34,22 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import android.os.Parcel;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.net.Inet4Address;
-import java.net.Inet6Address;
 import java.net.InetAddress;
 import java.net.InterfaceAddress;
 import java.net.NetworkInterface;
 import java.net.SocketException;
 import java.util.Arrays;
-import java.util.Collections;
-import java.util.Comparator;
 import java.util.List;
 
-import android.os.Parcel;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
-import org.junit.runner.RunWith;
-import org.junit.Test;
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class LinkAddressTest {
diff --git a/tests/net/java/android/net/LinkPropertiesTest.java b/tests/net/java/android/net/LinkPropertiesTest.java
index bdde096..9a7d487 100644
--- a/tests/net/java/android/net/LinkPropertiesTest.java
+++ b/tests/net/java/android/net/LinkPropertiesTest.java
@@ -24,11 +24,12 @@
 
 import android.net.LinkProperties.CompareResult;
 import android.net.LinkProperties.ProvisioningChange;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.system.OsConstants;
 import android.util.ArraySet;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.util.TestUtils;
 
 import org.junit.Test;
diff --git a/tests/net/java/android/net/MacAddressTest.java b/tests/net/java/android/net/MacAddressTest.java
index 8be807d..b0e5fb1 100644
--- a/tests/net/java/android/net/MacAddressTest.java
+++ b/tests/net/java/android/net/MacAddressTest.java
@@ -18,12 +18,12 @@
 
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/NetworkCapabilitiesTest.java b/tests/net/java/android/net/NetworkCapabilitiesTest.java
index 84f7359..4d4915b 100644
--- a/tests/net/java/android/net/NetworkCapabilitiesTest.java
+++ b/tests/net/java/android/net/NetworkCapabilitiesTest.java
@@ -42,10 +42,11 @@
 import static org.junit.Assert.fail;
 
 import android.os.Parcel;
-import android.support.test.runner.AndroidJUnit4;
 import android.test.suitebuilder.annotation.SmallTest;
 import android.util.ArraySet;
 
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
diff --git a/tests/net/java/android/net/NetworkStatsHistoryTest.java b/tests/net/java/android/net/NetworkStatsHistoryTest.java
index 301d04d..13558cd 100644
--- a/tests/net/java/android/net/NetworkStatsHistoryTest.java
+++ b/tests/net/java/android/net/NetworkStatsHistoryTest.java
@@ -16,14 +16,14 @@
 
 package android.net;
 
+import static android.net.NetworkStatsHistory.DataStreamUtils.readVarLong;
+import static android.net.NetworkStatsHistory.DataStreamUtils.writeVarLong;
+import static android.net.NetworkStatsHistory.Entry.UNKNOWN;
 import static android.net.NetworkStatsHistory.FIELD_ALL;
 import static android.net.NetworkStatsHistory.FIELD_OPERATIONS;
 import static android.net.NetworkStatsHistory.FIELD_RX_BYTES;
 import static android.net.NetworkStatsHistory.FIELD_RX_PACKETS;
 import static android.net.NetworkStatsHistory.FIELD_TX_BYTES;
-import static android.net.NetworkStatsHistory.DataStreamUtils.readVarLong;
-import static android.net.NetworkStatsHistory.DataStreamUtils.writeVarLong;
-import static android.net.NetworkStatsHistory.Entry.UNKNOWN;
 import static android.net.TrafficStats.GB_IN_BYTES;
 import static android.net.TrafficStats.MB_IN_BYTES;
 import static android.text.format.DateUtils.DAY_IN_MILLIS;
@@ -32,29 +32,30 @@
 import static android.text.format.DateUtils.SECOND_IN_MILLIS;
 import static android.text.format.DateUtils.WEEK_IN_MILLIS;
 import static android.text.format.DateUtils.YEAR_IN_MILLIS;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.test.suitebuilder.annotation.Suppress;
 import android.util.Log;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.frameworks.tests.net.R;
 
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.util.Random;
 
-import org.junit.After;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class NetworkStatsHistoryTest {
diff --git a/tests/net/java/android/net/NetworkStatsTest.java b/tests/net/java/android/net/NetworkStatsTest.java
index 2c2afd4..b5b0384 100644
--- a/tests/net/java/android/net/NetworkStatsTest.java
+++ b/tests/net/java/android/net/NetworkStatsTest.java
@@ -19,6 +19,7 @@
 import static android.net.NetworkStats.DEFAULT_NETWORK_ALL;
 import static android.net.NetworkStats.DEFAULT_NETWORK_NO;
 import static android.net.NetworkStats.DEFAULT_NETWORK_YES;
+import static android.net.NetworkStats.IFACE_ALL;
 import static android.net.NetworkStats.INTERFACES_ALL;
 import static android.net.NetworkStats.METERED_ALL;
 import static android.net.NetworkStats.METERED_NO;
@@ -26,31 +27,30 @@
 import static android.net.NetworkStats.ROAMING_ALL;
 import static android.net.NetworkStats.ROAMING_NO;
 import static android.net.NetworkStats.ROAMING_YES;
-import static android.net.NetworkStats.SET_DEFAULT;
-import static android.net.NetworkStats.SET_FOREGROUND;
+import static android.net.NetworkStats.SET_ALL;
 import static android.net.NetworkStats.SET_DBG_VPN_IN;
 import static android.net.NetworkStats.SET_DBG_VPN_OUT;
-import static android.net.NetworkStats.SET_ALL;
-import static android.net.NetworkStats.IFACE_ALL;
+import static android.net.NetworkStats.SET_DEFAULT;
+import static android.net.NetworkStats.SET_FOREGROUND;
 import static android.net.NetworkStats.TAG_ALL;
 import static android.net.NetworkStats.TAG_NONE;
 import static android.net.NetworkStats.UID_ALL;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
-import android.net.NetworkStats.Entry;
 import android.os.Process;
-import android.support.test.runner.AndroidJUnit4;
-import android.support.test.filters.SmallTest;
 import android.util.ArrayMap;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.google.android.collect.Sets;
 
-import java.util.HashSet;
-
-import org.junit.runner.RunWith;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.HashSet;
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
diff --git a/tests/net/java/android/net/NetworkTest.java b/tests/net/java/android/net/NetworkTest.java
index 94d01e9..0bee7cd 100644
--- a/tests/net/java/android/net/NetworkTest.java
+++ b/tests/net/java/android/net/NetworkTest.java
@@ -25,22 +25,22 @@
 import android.net.LocalSocket;
 import android.net.LocalSocketAddress;
 import android.net.Network;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import java.io.File;
 import java.io.FileDescriptor;
 import java.io.FileInputStream;
-import java.io.IOException;
 import java.net.DatagramSocket;
-import java.net.InetAddress;
 import java.net.Inet6Address;
+import java.net.InetAddress;
 import java.net.SocketException;
 import java.util.Objects;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class NetworkTest {
diff --git a/tests/net/java/android/net/NetworkUtilsTest.java b/tests/net/java/android/net/NetworkUtilsTest.java
index ba6e0f2..7748288 100644
--- a/tests/net/java/android/net/NetworkUtilsTest.java
+++ b/tests/net/java/android/net/NetworkUtilsTest.java
@@ -18,7 +18,7 @@
 
 import static junit.framework.Assert.assertEquals;
 
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -27,7 +27,7 @@
 import java.util.TreeSet;
 
 @RunWith(AndroidJUnit4.class)
-@android.support.test.filters.SmallTest
+@androidx.test.filters.SmallTest
 public class NetworkUtilsTest {
     @Test
     public void testRoutedIPv4AddressCount() {
diff --git a/tests/net/java/android/net/StaticIpConfigurationTest.java b/tests/net/java/android/net/StaticIpConfigurationTest.java
index 2b5ad37..8449ca7 100644
--- a/tests/net/java/android/net/StaticIpConfigurationTest.java
+++ b/tests/net/java/android/net/StaticIpConfigurationTest.java
@@ -23,8 +23,9 @@
 import static org.junit.Assert.assertTrue;
 
 import android.os.Parcel;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/UidRangeTest.java b/tests/net/java/android/net/UidRangeTest.java
index 860d732..ea1df09 100644
--- a/tests/net/java/android/net/UidRangeTest.java
+++ b/tests/net/java/android/net/UidRangeTest.java
@@ -16,15 +16,13 @@
 
 package android.net;
 
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
-import android.support.test.runner.AndroidJUnit4;
-import android.support.test.filters.SmallTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import org.junit.runner.RunWith;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
diff --git a/tests/net/java/android/net/captiveportal/CaptivePortalProbeSpecTest.java b/tests/net/java/android/net/captiveportal/CaptivePortalProbeSpecTest.java
index 40a8b3e..f948086 100644
--- a/tests/net/java/android/net/captiveportal/CaptivePortalProbeSpecTest.java
+++ b/tests/net/java/android/net/captiveportal/CaptivePortalProbeSpecTest.java
@@ -20,14 +20,13 @@
 import static junit.framework.Assert.assertNull;
 import static junit.framework.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
 import java.net.MalformedURLException;
-import java.net.URL;
 import java.text.ParseException;
 
 @RunWith(AndroidJUnit4.class)
diff --git a/tests/net/java/android/net/dhcp/DhcpServingParamsParcelExtTest.java b/tests/net/java/android/net/dhcp/DhcpServingParamsParcelExtTest.java
index 4a6f20a..e01ac7f 100644
--- a/tests/net/java/android/net/dhcp/DhcpServingParamsParcelExtTest.java
+++ b/tests/net/java/android/net/dhcp/DhcpServingParamsParcelExtTest.java
@@ -25,8 +25,9 @@
 import static org.junit.Assert.assertTrue;
 
 import android.net.LinkAddress;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/ip/InterfaceControllerTest.java b/tests/net/java/android/net/ip/InterfaceControllerTest.java
index d27a4f9..7a56b3a 100644
--- a/tests/net/java/android/net/ip/InterfaceControllerTest.java
+++ b/tests/net/java/android/net/ip/InterfaceControllerTest.java
@@ -28,8 +28,9 @@
 import android.net.InterfaceConfigurationParcel;
 import android.net.LinkAddress;
 import android.net.util.SharedLog;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/ip/IpServerTest.java b/tests/net/java/android/net/ip/IpServerTest.java
index f7542a7..05912e8 100644
--- a/tests/net/java/android/net/ip/IpServerTest.java
+++ b/tests/net/java/android/net/ip/IpServerTest.java
@@ -65,10 +65,11 @@
 import android.os.INetworkManagementService;
 import android.os.RemoteException;
 import android.os.test.TestLooper;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.text.TextUtils;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/ipmemorystore/ParcelableTests.java b/tests/net/java/android/net/ipmemorystore/ParcelableTests.java
index 1fc67a8..76cccc9 100644
--- a/tests/net/java/android/net/ipmemorystore/ParcelableTests.java
+++ b/tests/net/java/android/net/ipmemorystore/ParcelableTests.java
@@ -21,8 +21,9 @@
 
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/netlink/ConntrackMessageTest.java b/tests/net/java/android/net/netlink/ConntrackMessageTest.java
index 3aab942..5c86757 100644
--- a/tests/net/java/android/net/netlink/ConntrackMessageTest.java
+++ b/tests/net/java/android/net/netlink/ConntrackMessageTest.java
@@ -20,19 +20,18 @@
 import static org.junit.Assume.assumeTrue;
 
 import android.system.OsConstants;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import libcore.util.HexEncoding;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import org.junit.runner.RunWith;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import java.net.Inet4Address;
 import java.net.InetAddress;
-import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
-import java.util.Arrays;
-
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
diff --git a/tests/net/java/android/net/netlink/InetDiagSocketTest.java b/tests/net/java/android/net/netlink/InetDiagSocketTest.java
index 122edba..b6038ab 100644
--- a/tests/net/java/android/net/netlink/InetDiagSocketTest.java
+++ b/tests/net/java/android/net/netlink/InetDiagSocketTest.java
@@ -25,8 +25,6 @@
 import static android.system.OsConstants.IPPROTO_UDP;
 import static android.system.OsConstants.SOCK_DGRAM;
 import static android.system.OsConstants.SOCK_STREAM;
-import static android.system.OsConstants.SOL_SOCKET;
-import static android.system.OsConstants.SO_RCVTIMEO;
 
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
@@ -38,29 +36,25 @@
 import android.net.ConnectivityManager;
 import android.net.netlink.StructNlMsgHdr;
 import android.os.Process;
-import android.support.test.runner.AndroidJUnit4;
-import android.support.test.filters.SmallTest;
-import android.support.test.InstrumentationRegistry;
 import android.system.Os;
-import android.system.StructTimeval;
-import android.util.Log;
-import java.io.FileDescriptor;
-import java.net.DatagramSocket;
-import java.net.InetAddress;
-import java.net.Inet4Address;
-import java.net.Inet6Address;
-import java.net.InetSocketAddress;
-import java.net.ServerSocket;
-import java.net.Socket;
-import java.net.SocketAddress;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import libcore.util.HexEncoding;
 
 import org.junit.Before;
-import org.junit.runner.RunWith;
 import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.FileDescriptor;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
diff --git a/tests/net/java/android/net/netlink/NetlinkErrorMessageTest.java b/tests/net/java/android/net/netlink/NetlinkErrorMessageTest.java
index 6647760..44ab605 100644
--- a/tests/net/java/android/net/netlink/NetlinkErrorMessageTest.java
+++ b/tests/net/java/android/net/netlink/NetlinkErrorMessageTest.java
@@ -16,9 +16,10 @@
 
 package android.net.netlink;
 
-import static android.net.netlink.StructNlMsgHdr.NLM_F_REQUEST;
 import static android.net.netlink.StructNlMsgHdr.NLM_F_ACK;
 import static android.net.netlink.StructNlMsgHdr.NLM_F_REPLACE;
+import static android.net.netlink.StructNlMsgHdr.NLM_F_REQUEST;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
@@ -27,18 +28,17 @@
 import android.net.netlink.NetlinkErrorMessage;
 import android.net.netlink.NetlinkMessage;
 import android.net.netlink.StructNlMsgErr;
-import android.support.test.runner.AndroidJUnit4;
-import android.support.test.filters.SmallTest;
-import android.util.Log;
 
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-
-import org.junit.runner.RunWith;
-import org.junit.Test;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import libcore.util.HexEncoding;
 
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
diff --git a/tests/net/java/android/net/netlink/NetlinkSocketTest.java b/tests/net/java/android/net/netlink/NetlinkSocketTest.java
index 11be40b..3916578 100644
--- a/tests/net/java/android/net/netlink/NetlinkSocketTest.java
+++ b/tests/net/java/android/net/netlink/NetlinkSocketTest.java
@@ -18,31 +18,29 @@
 
 import static android.net.netlink.NetlinkSocket.DEFAULT_RECV_BUFSIZE;
 import static android.system.OsConstants.NETLINK_ROUTE;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
 import android.net.netlink.NetlinkSocket;
 import android.net.netlink.RtNetlinkNeighborMessage;
-import android.net.netlink.StructNdMsg;
 import android.net.netlink.StructNlMsgHdr;
-import android.support.test.runner.AndroidJUnit4;
-import android.support.test.filters.SmallTest;
-import android.system.ErrnoException;
 import android.system.NetlinkSocketAddress;
 import android.system.Os;
-import android.util.Log;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import libcore.io.IoUtils;
 
-import java.io.InterruptedIOException;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.io.FileDescriptor;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 
-import org.junit.runner.RunWith;
-import org.junit.Test;
-
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class NetlinkSocketTest {
diff --git a/tests/net/java/android/net/netlink/RtNetlinkNeighborMessageTest.java b/tests/net/java/android/net/netlink/RtNetlinkNeighborMessageTest.java
index c9fd74f..8162522 100644
--- a/tests/net/java/android/net/netlink/RtNetlinkNeighborMessageTest.java
+++ b/tests/net/java/android/net/netlink/RtNetlinkNeighborMessageTest.java
@@ -25,23 +25,22 @@
 import android.net.netlink.RtNetlinkNeighborMessage;
 import android.net.netlink.StructNdMsg;
 import android.net.netlink.StructNlMsgHdr;
-import android.support.test.runner.AndroidJUnit4;
-import android.support.test.filters.SmallTest;
 import android.system.OsConstants;
-import android.util.Log;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import libcore.util.HexEncoding;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import java.net.Inet4Address;
 import java.net.InetAddress;
-import java.net.UnknownHostException;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
 import java.util.Arrays;
 
-import org.junit.runner.RunWith;
-import org.junit.Test;
-
-import libcore.util.HexEncoding;
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class RtNetlinkNeighborMessageTest {
diff --git a/tests/net/java/android/net/nsd/NsdManagerTest.java b/tests/net/java/android/net/nsd/NsdManagerTest.java
index 0a5a6aa..2d2bccb 100644
--- a/tests/net/java/android/net/nsd/NsdManagerTest.java
+++ b/tests/net/java/android/net/nsd/NsdManagerTest.java
@@ -16,29 +16,31 @@
 
 package android.net.nsd;
 
+import static com.android.internal.util.TestUtils.waitForIdleHandler;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.timeout;
-import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
-import static com.android.internal.util.TestUtils.waitForIdleHandler;
 
-import android.os.HandlerThread;
-import android.os.Handler;
-import android.os.Looper;
 import android.content.Context;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Looper;
 import android.os.Message;
 import android.os.Messenger;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.util.AsyncChannel;
+
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -46,8 +48,6 @@
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import java.util.function.Consumer;
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class NsdManagerTest {
diff --git a/tests/net/java/android/net/nsd/NsdServiceInfoTest.java b/tests/net/java/android/net/nsd/NsdServiceInfoTest.java
index e48b522..94dfc75 100644
--- a/tests/net/java/android/net/nsd/NsdServiceInfoTest.java
+++ b/tests/net/java/android/net/nsd/NsdServiceInfoTest.java
@@ -24,20 +24,18 @@
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.StrictMode;
-import android.net.nsd.NsdServiceInfo;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.util.Log;
 
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.Map;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.util.Arrays;
+import java.util.Map;
+
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class NsdServiceInfoTest {
diff --git a/tests/net/java/android/net/shared/Inet4AddressUtilsTest.java b/tests/net/java/android/net/shared/Inet4AddressUtilsTest.java
index 6da8514..35f8c79 100644
--- a/tests/net/java/android/net/shared/Inet4AddressUtilsTest.java
+++ b/tests/net/java/android/net/shared/Inet4AddressUtilsTest.java
@@ -32,8 +32,9 @@
 import static org.junit.Assert.fail;
 
 import android.net.InetAddresses;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/shared/InitialConfigurationTest.java b/tests/net/java/android/net/shared/InitialConfigurationTest.java
index 78792bd..27bc13d 100644
--- a/tests/net/java/android/net/shared/InitialConfigurationTest.java
+++ b/tests/net/java/android/net/shared/InitialConfigurationTest.java
@@ -24,8 +24,9 @@
 
 import android.net.IpPrefix;
 import android.net.LinkAddress;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/shared/IpConfigurationParcelableUtilTest.java b/tests/net/java/android/net/shared/IpConfigurationParcelableUtilTest.java
index fb4d43c..3e86e77 100644
--- a/tests/net/java/android/net/shared/IpConfigurationParcelableUtilTest.java
+++ b/tests/net/java/android/net/shared/IpConfigurationParcelableUtilTest.java
@@ -27,8 +27,9 @@
 import android.net.LinkAddress;
 import android.net.StaticIpConfiguration;
 import android.net.apf.ApfCapabilities;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/shared/LinkPropertiesParcelableUtilTest.java b/tests/net/java/android/net/shared/LinkPropertiesParcelableUtilTest.java
index b6d01db..2d0e03d 100644
--- a/tests/net/java/android/net/shared/LinkPropertiesParcelableUtilTest.java
+++ b/tests/net/java/android/net/shared/LinkPropertiesParcelableUtilTest.java
@@ -29,8 +29,9 @@
 import android.net.ProxyInfo;
 import android.net.RouteInfo;
 import android.net.Uri;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/shared/ProvisioningConfigurationTest.java b/tests/net/java/android/net/shared/ProvisioningConfigurationTest.java
index 6ea47d2..6fad89e 100644
--- a/tests/net/java/android/net/shared/ProvisioningConfigurationTest.java
+++ b/tests/net/java/android/net/shared/ProvisioningConfigurationTest.java
@@ -27,8 +27,9 @@
 import android.net.Network;
 import android.net.StaticIpConfiguration;
 import android.net.apf.ApfCapabilities;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/android/net/util/InterfaceParamsTest.java b/tests/net/java/android/net/util/InterfaceParamsTest.java
index 21728af..141455c 100644
--- a/tests/net/java/android/net/util/InterfaceParamsTest.java
+++ b/tests/net/java/android/net/util/InterfaceParamsTest.java
@@ -21,13 +21,12 @@
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class InterfaceParamsTest {
diff --git a/tests/net/java/android/net/util/InterfaceSetTest.java b/tests/net/java/android/net/util/InterfaceSetTest.java
index 8012838..ea084b6 100644
--- a/tests/net/java/android/net/util/InterfaceSetTest.java
+++ b/tests/net/java/android/net/util/InterfaceSetTest.java
@@ -20,8 +20,8 @@
 import static junit.framework.Assert.assertFalse;
 import static junit.framework.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/android/net/util/IpUtilsTest.java b/tests/net/java/android/net/util/IpUtilsTest.java
index 8903bf9..193d85d 100644
--- a/tests/net/java/android/net/util/IpUtilsTest.java
+++ b/tests/net/java/android/net/util/IpUtilsTest.java
@@ -18,14 +18,14 @@
 
 import static org.junit.Assert.assertEquals;
 
-import android.support.test.runner.AndroidJUnit4;
-import android.support.test.filters.SmallTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 import java.nio.ByteBuffer;
 
-import org.junit.runner.RunWith;
-import org.junit.Test;
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class IpUtilsTest {
diff --git a/tests/net/java/android/net/util/SharedLogTest.java b/tests/net/java/android/net/util/SharedLogTest.java
index 8604860..e1dba36 100644
--- a/tests/net/java/android/net/util/SharedLogTest.java
+++ b/tests/net/java/android/net/util/SharedLogTest.java
@@ -19,16 +19,14 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
 import java.io.ByteArrayOutputStream;
 import java.io.PrintWriter;
-import java.util.ArrayList;
-import java.util.Vector;
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
diff --git a/tests/net/java/android/net/util/VersionedBroadcastListenerTest.java b/tests/net/java/android/net/util/VersionedBroadcastListenerTest.java
index 39f59f1..0d27d5b 100644
--- a/tests/net/java/android/net/util/VersionedBroadcastListenerTest.java
+++ b/tests/net/java/android/net/util/VersionedBroadcastListenerTest.java
@@ -26,21 +26,19 @@
 import android.os.Looper;
 import android.os.UserHandle;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.internal.util.test.BroadcastInterceptingContext;
 
 import org.junit.After;
 import org.junit.Before;
 import org.junit.BeforeClass;
-import org.junit.runner.RunWith;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 import org.mockito.Mock;
-import org.mockito.Mockito;
 import org.mockito.MockitoAnnotations;
 
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class VersionedBroadcastListenerTest {
diff --git a/tests/net/java/com/android/internal/net/NetworkStatsFactoryTest.java b/tests/net/java/com/android/internal/net/NetworkStatsFactoryTest.java
index 90bf7b1..4ec4fdd 100644
--- a/tests/net/java/com/android/internal/net/NetworkStatsFactoryTest.java
+++ b/tests/net/java/com/android/internal/net/NetworkStatsFactoryTest.java
@@ -24,33 +24,36 @@
 import static android.net.NetworkStats.SET_FOREGROUND;
 import static android.net.NetworkStats.TAG_NONE;
 import static android.net.NetworkStats.UID_ALL;
+
 import static com.android.server.NetworkManagementSocketTagger.kernelToTag;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
 import android.content.res.Resources;
 import android.net.NetworkStats;
 import android.net.TrafficStats;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.frameworks.tests.net.R;
 
+import libcore.io.IoUtils;
+import libcore.io.Streams;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.FileWriter;
 import java.io.InputStream;
 import java.io.OutputStream;
 
-import libcore.io.IoUtils;
-import libcore.io.Streams;
-
-import org.junit.runner.RunWith;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-
 /**
  * Tests for {@link NetworkStatsFactory}.
  */
diff --git a/tests/net/java/com/android/internal/util/BitUtilsTest.java b/tests/net/java/com/android/internal/util/BitUtilsTest.java
index f4dc12a..01fb0df 100644
--- a/tests/net/java/com/android/internal/util/BitUtilsTest.java
+++ b/tests/net/java/com/android/internal/util/BitUtilsTest.java
@@ -16,14 +16,24 @@
 
 package com.android.internal.util;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import java.nio.ByteBuffer;
+import static com.android.internal.util.BitUtils.bytesToBEInt;
+import static com.android.internal.util.BitUtils.bytesToLEInt;
+import static com.android.internal.util.BitUtils.getUint16;
+import static com.android.internal.util.BitUtils.getUint32;
+import static com.android.internal.util.BitUtils.getUint8;
+import static com.android.internal.util.BitUtils.uint16;
+import static com.android.internal.util.BitUtils.uint32;
+import static com.android.internal.util.BitUtils.uint8;
+
+import static org.junit.Assert.assertEquals;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import static org.junit.Assert.assertEquals;
-import static com.android.internal.util.BitUtils.*;
+import java.nio.ByteBuffer;
 
 @SmallTest
 @RunWith(AndroidJUnit4.class)
diff --git a/tests/net/java/com/android/internal/util/RingBufferTest.java b/tests/net/java/com/android/internal/util/RingBufferTest.java
index 90a373a..eff334f 100644
--- a/tests/net/java/com/android/internal/util/RingBufferTest.java
+++ b/tests/net/java/com/android/internal/util/RingBufferTest.java
@@ -16,19 +16,18 @@
 
 package com.android.internal.util;
 
-import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
+
 import java.util.Arrays;
 import java.util.Objects;
 
-
 @SmallTest
 @RunWith(AndroidJUnit4.class)
 public class RingBufferTest {
diff --git a/tests/net/java/com/android/server/ConnectivityServiceTest.java b/tests/net/java/com/android/server/ConnectivityServiceTest.java
index c25ad5f..9453a80 100644
--- a/tests/net/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/net/java/com/android/server/ConnectivityServiceTest.java
@@ -148,14 +148,15 @@
 import android.os.SystemClock;
 import android.os.UserHandle;
 import android.provider.Settings;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.test.mock.MockContentResolver;
 import android.text.TextUtils;
 import android.util.ArraySet;
 import android.util.Log;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.net.VpnConfig;
 import com.android.internal.net.VpnInfo;
 import com.android.internal.util.ArrayUtils;
@@ -204,7 +205,6 @@
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Predicate;
 
-
 /**
  * Tests for {@link ConnectivityService}.
  *
diff --git a/tests/net/java/com/android/server/IpSecServiceParameterizedTest.java b/tests/net/java/com/android/server/IpSecServiceParameterizedTest.java
index a844cfe..7c40adf 100644
--- a/tests/net/java/com/android/server/IpSecServiceParameterizedTest.java
+++ b/tests/net/java/com/android/server/IpSecServiceParameterizedTest.java
@@ -18,6 +18,7 @@
 
 import static android.system.OsConstants.AF_INET;
 import static android.system.OsConstants.AF_INET6;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
@@ -45,13 +46,10 @@
 import android.net.NetworkUtils;
 import android.os.Binder;
 import android.os.ParcelFileDescriptor;
-import android.support.test.filters.SmallTest;
 import android.system.Os;
 import android.test.mock.MockContext;
 
-import java.net.Socket;
-import java.util.Arrays;
-import java.util.Collection;
+import androidx.test.filters.SmallTest;
 
 import org.junit.Before;
 import org.junit.Ignore;
@@ -59,6 +57,10 @@
 import org.junit.runner.RunWith;
 import org.junit.runners.Parameterized;
 
+import java.net.Socket;
+import java.util.Arrays;
+import java.util.Collection;
+
 /** Unit tests for {@link IpSecService}. */
 @SmallTest
 @RunWith(Parameterized.class)
diff --git a/tests/net/java/com/android/server/IpSecServiceRefcountedResourceTest.java b/tests/net/java/com/android/server/IpSecServiceRefcountedResourceTest.java
index cf8f715..68ff777 100644
--- a/tests/net/java/com/android/server/IpSecServiceRefcountedResourceTest.java
+++ b/tests/net/java/com/android/server/IpSecServiceRefcountedResourceTest.java
@@ -31,22 +31,23 @@
 import android.os.Binder;
 import android.os.IBinder;
 import android.os.RemoteException;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.server.IpSecService.IResource;
 import com.android.server.IpSecService.RefcountedResource;
 
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.concurrent.ThreadLocalRandom;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 /** Unit tests for {@link IpSecService.RefcountedResource}. */
 @SmallTest
 @RunWith(AndroidJUnit4.class)
diff --git a/tests/net/java/com/android/server/IpSecServiceTest.java b/tests/net/java/com/android/server/IpSecServiceTest.java
index 5be7c7b..b5c3e92 100644
--- a/tests/net/java/com/android/server/IpSecServiceTest.java
+++ b/tests/net/java/com/android/server/IpSecServiceTest.java
@@ -20,6 +20,7 @@
 import static android.system.OsConstants.EADDRINUSE;
 import static android.system.OsConstants.IPPROTO_UDP;
 import static android.system.OsConstants.SOCK_DGRAM;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotEquals;
 import static org.junit.Assert.assertNotNull;
@@ -39,19 +40,24 @@
 import android.net.IpSecConfig;
 import android.net.IpSecManager;
 import android.net.IpSecSpiResponse;
-import android.net.IpSecTransform;
 import android.net.IpSecUdpEncapResponse;
 import android.os.Binder;
 import android.os.ParcelFileDescriptor;
 import android.os.Process;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.system.StructStat;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import dalvik.system.SocketTagger;
 
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentMatcher;
+
 import java.io.FileDescriptor;
 import java.net.InetAddress;
 import java.net.ServerSocket;
@@ -60,11 +66,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.ArgumentMatcher;
-
 /** Unit tests for {@link IpSecService}. */
 @SmallTest
 @RunWith(AndroidJUnit4.class)
diff --git a/tests/net/java/com/android/server/NetworkManagementServiceTest.java b/tests/net/java/com/android/server/NetworkManagementServiceTest.java
index 56a075b..6fb3225 100644
--- a/tests/net/java/com/android/server/NetworkManagementServiceTest.java
+++ b/tests/net/java/com/android/server/NetworkManagementServiceTest.java
@@ -26,21 +26,19 @@
 import android.content.Context;
 import android.net.INetd;
 import android.net.LinkAddress;
-import android.net.LocalSocket;
 import android.net.LocalServerSocket;
+import android.net.LocalSocket;
 import android.os.BatteryStats;
 import android.os.Binder;
 import android.os.IBinder;
-import android.support.test.runner.AndroidJUnit4;
 import android.test.suitebuilder.annotation.SmallTest;
 
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.app.IBatteryStats;
 import com.android.server.NetworkManagementService.SystemServices;
 import com.android.server.net.BaseNetworkObserver;
 
-import java.io.IOException;
-import java.io.OutputStream;
-
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -48,6 +46,9 @@
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
+import java.io.IOException;
+import java.io.OutputStream;
+
 /**
  * Tests for {@link NetworkManagementService}.
  */
diff --git a/tests/net/java/com/android/server/NsdServiceTest.java b/tests/net/java/com/android/server/NsdServiceTest.java
index b88c784..a90fa68 100644
--- a/tests/net/java/com/android/server/NsdServiceTest.java
+++ b/tests/net/java/com/android/server/NsdServiceTest.java
@@ -22,23 +22,25 @@
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.timeout;
-import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.content.ContentResolver;
+import android.content.Context;
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Looper;
 import android.os.Message;
-import android.content.Context;
-import android.content.ContentResolver;
-import android.net.nsd.NsdManager;
-import android.net.nsd.NsdServiceInfo;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.NsdService.DaemonConnection;
 import com.android.server.NsdService.DaemonConnectionSupplier;
 import com.android.server.NsdService.NativeCallbackReceiver;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/com/android/server/connectivity/DnsManagerTest.java b/tests/net/java/com/android/server/connectivity/DnsManagerTest.java
index 38322e9..15ba43d 100644
--- a/tests/net/java/com/android/server/connectivity/DnsManagerTest.java
+++ b/tests/net/java/com/android/server/connectivity/DnsManagerTest.java
@@ -37,10 +37,11 @@
 import android.net.shared.PrivateDnsConfig;
 import android.os.INetworkManagementService;
 import android.provider.Settings;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.test.mock.MockContentResolver;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.util.test.FakeSettingsProvider;
 
 import org.junit.Before;
diff --git a/tests/net/java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java b/tests/net/java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java
index 0656c5f..70495cc 100644
--- a/tests/net/java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java
+++ b/tests/net/java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java
@@ -16,52 +16,44 @@
 
 package com.android.server.connectivity;
 
-import static android.net.metrics.INetdEventListener.EVENT_GETADDRINFO;
-import static android.net.metrics.INetdEventListener.EVENT_GETHOSTBYNAME;
-import static com.android.server.connectivity.MetricsTestUtil.aBool;
-import static com.android.server.connectivity.MetricsTestUtil.aByteArray;
 import static com.android.server.connectivity.MetricsTestUtil.aLong;
 import static com.android.server.connectivity.MetricsTestUtil.aString;
 import static com.android.server.connectivity.MetricsTestUtil.aType;
 import static com.android.server.connectivity.MetricsTestUtil.anInt;
-import static com.android.server.connectivity.MetricsTestUtil.anIntArray;
-import static com.android.server.connectivity.MetricsTestUtil.b;
 import static com.android.server.connectivity.MetricsTestUtil.describeIpEvent;
-import static com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpConnectivityLog;
 import static com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.BLUETOOTH;
 import static com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.CELLULAR;
-import static com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.ETHERNET;
+import static com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpConnectivityLog;
 import static com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.MULTIPLE;
 import static com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.WIFI;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
 import android.net.ConnectivityMetricsEvent;
 import android.net.metrics.ApfProgramEvent;
 import android.net.metrics.ApfStats;
-import android.net.metrics.ConnectStats;
 import android.net.metrics.DefaultNetworkEvent;
 import android.net.metrics.DhcpClientEvent;
 import android.net.metrics.DhcpErrorEvent;
-import android.net.metrics.DnsEvent;
-import android.net.metrics.DnsEvent;
 import android.net.metrics.IpManagerEvent;
 import android.net.metrics.IpReachabilityEvent;
 import android.net.metrics.NetworkEvent;
 import android.net.metrics.RaEvent;
 import android.net.metrics.ValidationProbeEvent;
 import android.net.metrics.WakeupStats;
-import android.support.test.runner.AndroidJUnit4;
 import android.test.suitebuilder.annotation.SmallTest;
 
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpConnectivityEvent;
 
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.util.Arrays;
 import java.util.List;
 
-import org.junit.runner.RunWith;
-import org.junit.Test;
-
 // TODO: instead of comparing textpb to textpb, parse textpb and compare proto to proto.
 @RunWith(AndroidJUnit4.class)
 @SmallTest
diff --git a/tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java b/tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java
index 1a0cb74..d5b2c87 100644
--- a/tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java
+++ b/tests/net/java/com/android/server/connectivity/IpConnectivityMetricsTest.java
@@ -47,11 +47,12 @@
 import android.net.metrics.RaEvent;
 import android.net.metrics.ValidationProbeEvent;
 import android.os.Parcelable;
-import android.support.test.runner.AndroidJUnit4;
 import android.system.OsConstants;
 import android.test.suitebuilder.annotation.SmallTest;
 import android.util.Base64;
 
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.util.BitUtils;
 import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass;
 
diff --git a/tests/net/java/com/android/server/connectivity/LingerMonitorTest.java b/tests/net/java/com/android/server/connectivity/LingerMonitorTest.java
index aa6cbda..38352b3 100644
--- a/tests/net/java/com/android/server/connectivity/LingerMonitorTest.java
+++ b/tests/net/java/com/android/server/connectivity/LingerMonitorTest.java
@@ -38,10 +38,11 @@
 import android.net.NetworkInfo;
 import android.net.NetworkMisc;
 import android.os.INetworkManagementService;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.text.format.DateUtils;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.R;
 import com.android.server.ConnectivityService;
 import com.android.server.connectivity.NetworkNotificationManager.NotificationType;
diff --git a/tests/net/java/com/android/server/connectivity/MultipathPolicyTrackerTest.java b/tests/net/java/com/android/server/connectivity/MultipathPolicyTrackerTest.java
index e58811b..b783467 100644
--- a/tests/net/java/com/android/server/connectivity/MultipathPolicyTrackerTest.java
+++ b/tests/net/java/com/android/server/connectivity/MultipathPolicyTrackerTest.java
@@ -28,7 +28,6 @@
 import static com.android.server.net.NetworkPolicyManagerInternal.QUOTA_TYPE_MULTIPATH;
 import static com.android.server.net.NetworkPolicyManagerService.OPPORTUNISTIC_QUOTA_UNKNOWN;
 
-import static junit.framework.TestCase.assertEquals;
 import static junit.framework.TestCase.assertNotNull;
 
 import static org.mockito.ArgumentMatchers.any;
@@ -54,13 +53,14 @@
 import android.net.StringNetworkSpecifier;
 import android.os.Handler;
 import android.provider.Settings;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.TelephonyManager;
 import android.test.mock.MockContentResolver;
 import android.util.DataUnit;
 import android.util.RecurrenceRule;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.R;
 import com.android.internal.util.test.FakeSettingsProvider;
 import com.android.server.LocalServices;
diff --git a/tests/net/java/com/android/server/connectivity/Nat464XlatTest.java b/tests/net/java/com/android/server/connectivity/Nat464XlatTest.java
index 37c0df8..cc09fb7 100644
--- a/tests/net/java/com/android/server/connectivity/Nat464XlatTest.java
+++ b/tests/net/java/com/android/server/connectivity/Nat464XlatTest.java
@@ -37,8 +37,9 @@
 import android.os.Handler;
 import android.os.INetworkManagementService;
 import android.os.test.TestLooper;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.server.ConnectivityService;
 
diff --git a/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java b/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
index 67805c9..e4117b8 100644
--- a/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
+++ b/tests/net/java/com/android/server/connectivity/NetdEventListenerServiceTest.java
@@ -18,43 +18,37 @@
 
 import static android.net.metrics.INetdEventListener.EVENT_GETADDRINFO;
 import static android.net.metrics.INetdEventListener.EVENT_GETHOSTBYNAME;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
-import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.anyInt;
-import static org.mockito.Mockito.eq;
-import static org.mockito.Mockito.timeout;
-import static org.mockito.Mockito.times;
-import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
 import android.net.ConnectivityManager;
 import android.net.Network;
 import android.net.NetworkCapabilities;
-import android.support.test.runner.AndroidJUnit4;
 import android.system.OsConstants;
 import android.test.suitebuilder.annotation.SmallTest;
 import android.util.Base64;
 
-import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.DNSLookupBatch;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpConnectivityEvent;
 import com.android.server.connectivity.metrics.nano.IpConnectivityLogClass.IpConnectivityLog;
 
-import java.io.FileOutputStream;
-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Comparator;
-import java.util.List;
-
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.io.FileOutputStream;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class NetdEventListenerServiceTest {
diff --git a/tests/net/java/com/android/server/connectivity/NetworkNotificationManagerTest.java b/tests/net/java/com/android/server/connectivity/NetworkNotificationManagerTest.java
index 273b8fc..9580763 100644
--- a/tests/net/java/com/android/server/connectivity/NetworkNotificationManagerTest.java
+++ b/tests/net/java/com/android/server/connectivity/NetworkNotificationManagerTest.java
@@ -35,10 +35,11 @@
 import android.content.res.Resources;
 import android.net.NetworkCapabilities;
 import android.net.NetworkInfo;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.TelephonyManager;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.connectivity.NetworkNotificationManager.NotificationType;
 
 import org.junit.Before;
diff --git a/tests/net/java/com/android/server/connectivity/PermissionMonitorTest.java b/tests/net/java/com/android/server/connectivity/PermissionMonitorTest.java
index f2bd770..354c08f 100644
--- a/tests/net/java/com/android/server/connectivity/PermissionMonitorTest.java
+++ b/tests/net/java/com/android/server/connectivity/PermissionMonitorTest.java
@@ -50,8 +50,9 @@
 import android.os.Build;
 import android.os.INetworkManagementService;
 import android.os.UserHandle;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
diff --git a/tests/net/java/com/android/server/connectivity/TetheringTest.java b/tests/net/java/com/android/server/connectivity/TetheringTest.java
index 533d7ad..a12b0a0 100644
--- a/tests/net/java/com/android/server/connectivity/TetheringTest.java
+++ b/tests/net/java/com/android/server/connectivity/TetheringTest.java
@@ -98,11 +98,12 @@
 import android.os.UserManager;
 import android.os.test.TestLooper;
 import android.provider.Settings;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.CarrierConfigManager;
 import android.test.mock.MockContentResolver;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.StateMachine;
 import com.android.internal.util.test.BroadcastInterceptingContext;
diff --git a/tests/net/java/com/android/server/connectivity/VpnTest.java b/tests/net/java/com/android/server/connectivity/VpnTest.java
index b5d1ff9..2cae250 100644
--- a/tests/net/java/com/android/server/connectivity/VpnTest.java
+++ b/tests/net/java/com/android/server/connectivity/VpnTest.java
@@ -73,11 +73,12 @@
 import android.os.SystemClock;
 import android.os.UserHandle;
 import android.os.UserManager;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.ArrayMap;
 import android.util.ArraySet;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.R;
 import com.android.internal.net.VpnConfig;
 
diff --git a/tests/net/java/com/android/server/connectivity/tethering/EntitlementManagerTest.java b/tests/net/java/com/android/server/connectivity/tethering/EntitlementManagerTest.java
index 193f380..d685e8c 100644
--- a/tests/net/java/com/android/server/connectivity/tethering/EntitlementManagerTest.java
+++ b/tests/net/java/com/android/server/connectivity/tethering/EntitlementManagerTest.java
@@ -42,11 +42,12 @@
 import android.os.ResultReceiver;
 import android.os.test.TestLooper;
 import android.provider.Settings;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.CarrierConfigManager;
 import android.test.mock.MockContentResolver;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.R;
 import com.android.internal.util.State;
 import com.android.internal.util.StateMachine;
diff --git a/tests/net/java/com/android/server/connectivity/tethering/OffloadControllerTest.java b/tests/net/java/com/android/server/connectivity/tethering/OffloadControllerTest.java
index b98f63b..be54b1a 100644
--- a/tests/net/java/com/android/server/connectivity/tethering/OffloadControllerTest.java
+++ b/tests/net/java/com/android/server/connectivity/tethering/OffloadControllerTest.java
@@ -23,7 +23,9 @@
 import static android.net.NetworkStats.UID_ALL;
 import static android.net.TrafficStats.UID_TETHERING;
 import static android.provider.Settings.Global.TETHER_OFFLOAD_DISABLED;
+
 import static com.android.server.connectivity.tethering.OffloadHardwareInterface.ForwardedStats;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -35,7 +37,6 @@
 import static org.mockito.Mockito.clearInvocations;
 import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.never;
-import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
@@ -52,30 +53,30 @@
 import android.net.util.SharedLog;
 import android.os.ConditionVariable;
 import android.os.Handler;
-import android.os.Looper;
 import android.os.INetworkManagementService;
+import android.os.Looper;
 import android.provider.Settings;
 import android.provider.Settings.SettingNotFoundException;
-
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.test.mock.MockContentResolver;
-import com.android.internal.util.test.FakeSettingsProvider;
 
-import java.net.InetAddress;
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.Set;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.internal.util.test.FakeSettingsProvider;
 
 import org.junit.After;
 import org.junit.Before;
-import org.junit.runner.RunWith;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 import org.mockito.ArgumentCaptor;
 import org.mockito.InOrder;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.Set;
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
diff --git a/tests/net/java/com/android/server/connectivity/tethering/TetheringConfigurationTest.java b/tests/net/java/com/android/server/connectivity/tethering/TetheringConfigurationTest.java
index f8cfd8f..36a1b7c 100644
--- a/tests/net/java/com/android/server/connectivity/tethering/TetheringConfigurationTest.java
+++ b/tests/net/java/com/android/server/connectivity/tethering/TetheringConfigurationTest.java
@@ -36,11 +36,12 @@
 import android.content.res.Resources;
 import android.net.util.SharedLog;
 import android.provider.Settings;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.TelephonyManager;
 import android.test.mock.MockContentResolver;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.util.test.BroadcastInterceptingContext;
 import com.android.internal.util.test.FakeSettingsProvider;
 
diff --git a/tests/net/java/com/android/server/connectivity/tethering/UpstreamNetworkMonitorTest.java b/tests/net/java/com/android/server/connectivity/tethering/UpstreamNetworkMonitorTest.java
index 0afd607..5a1f853 100644
--- a/tests/net/java/com/android/server/connectivity/tethering/UpstreamNetworkMonitorTest.java
+++ b/tests/net/java/com/android/server/connectivity/tethering/UpstreamNetworkMonitorTest.java
@@ -41,8 +41,6 @@
 import static org.mockito.Mockito.when;
 
 import android.content.Context;
-import android.os.Handler;
-import android.os.Message;
 import android.net.ConnectivityManager;
 import android.net.ConnectivityManager.NetworkCallback;
 import android.net.IConnectivityManager;
@@ -54,16 +52,19 @@
 import android.net.NetworkRequest;
 import android.net.NetworkState;
 import android.net.util.SharedLog;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import android.os.Handler;
+import android.os.Message;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.internal.util.State;
 import com.android.internal.util.StateMachine;
 
 import org.junit.After;
 import org.junit.Before;
-import org.junit.runner.RunWith;
 import org.junit.Test;
+import org.junit.runner.RunWith;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
@@ -76,7 +77,6 @@
 import java.util.Objects;
 import java.util.Set;
 
-
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class UpstreamNetworkMonitorTest {
diff --git a/tests/net/java/com/android/server/net/NetworkStatsAccessTest.java b/tests/net/java/com/android/server/net/NetworkStatsAccessTest.java
index b870bbd..6e725dd 100644
--- a/tests/net/java/com/android/server/net/NetworkStatsAccessTest.java
+++ b/tests/net/java/com/android/server/net/NetworkStatsAccessTest.java
@@ -26,10 +26,11 @@
 import android.app.admin.DevicePolicyManagerInternal;
 import android.content.Context;
 import android.content.pm.PackageManager;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.TelephonyManager;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.LocalServices;
 
 import org.junit.After;
diff --git a/tests/net/java/com/android/server/net/NetworkStatsCollectionTest.java b/tests/net/java/com/android/server/net/NetworkStatsCollectionTest.java
index 6f14332..830c928 100644
--- a/tests/net/java/com/android/server/net/NetworkStatsCollectionTest.java
+++ b/tests/net/java/com/android/server/net/NetworkStatsCollectionTest.java
@@ -26,12 +26,13 @@
 import static android.os.Process.myUid;
 import static android.text.format.DateUtils.HOUR_IN_MILLIS;
 import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
+
+import static com.android.server.net.NetworkStatsCollection.multiplySafe;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
 
-import static com.android.server.net.NetworkStatsCollection.multiplySafe;
-
 import android.content.res.Resources;
 import android.net.ConnectivityManager;
 import android.net.NetworkIdentity;
@@ -40,20 +41,26 @@
 import android.net.NetworkTemplate;
 import android.os.Process;
 import android.os.UserHandle;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.SubscriptionPlan;
 import android.telephony.TelephonyManager;
 import android.test.MoreAsserts;
 import android.text.format.DateUtils;
 import android.util.RecurrenceRule;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.frameworks.tests.net.R;
 
 import libcore.io.IoUtils;
 import libcore.io.Streams;
 
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
@@ -68,11 +75,6 @@
 import java.util.ArrayList;
 import java.util.List;
 
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 /**
  * Tests for {@link NetworkStatsCollection}.
  */
diff --git a/tests/net/java/com/android/server/net/NetworkStatsObserversTest.java b/tests/net/java/com/android/server/net/NetworkStatsObserversTest.java
index 185c3eb..43a3803 100644
--- a/tests/net/java/com/android/server/net/NetworkStatsObserversTest.java
+++ b/tests/net/java/com/android/server/net/NetworkStatsObserversTest.java
@@ -17,7 +17,6 @@
 package com.android.server.net;
 
 import static android.net.ConnectivityManager.TYPE_MOBILE;
-import static android.net.ConnectivityManager.TYPE_WIFI;
 import static android.net.NetworkStats.DEFAULT_NETWORK_NO;
 import static android.net.NetworkStats.DEFAULT_NETWORK_YES;
 import static android.net.NetworkStats.METERED_NO;
@@ -33,11 +32,8 @@
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyInt;
-import static org.mockito.Matchers.isA;
-import static org.mockito.Mockito.when;
 
 import android.app.usage.NetworkStatsManager;
 import android.net.DataUsageRequest;
@@ -49,22 +45,17 @@
 import android.os.HandlerThread;
 import android.os.IBinder;
 import android.os.Looper;
-import android.os.Message;
 import android.os.Messenger;
 import android.os.Process;
 import android.os.UserHandle;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.TelephonyManager;
 import android.util.ArrayMap;
 
-import com.android.internal.net.VpnInfo;
-import com.android.server.net.NetworkStatsService;
-import com.android.server.net.NetworkStatsServiceTest.LatchedHandler;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import java.util.ArrayList;
-import java.util.Objects;
-import java.util.List;
+import com.android.internal.net.VpnInfo;
+import com.android.server.net.NetworkStatsServiceTest.LatchedHandler;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -73,6 +64,8 @@
 import org.mockito.Mockito;
 import org.mockito.MockitoAnnotations;
 
+import java.util.Objects;
+
 /**
  * Tests for {@link NetworkStatsObservers}.
  */
diff --git a/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java b/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
index d91d3eb..598448b 100644
--- a/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
+++ b/tests/net/java/com/android/server/net/NetworkStatsServiceTest.java
@@ -91,15 +91,15 @@
 import android.os.Messenger;
 import android.os.PowerManager;
 import android.os.SimpleClock;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.telephony.TelephonyManager;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.net.VpnInfo;
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.test.BroadcastInterceptingContext;
-import com.android.server.LocalServices;
 import com.android.server.net.NetworkStatsService.NetworkStatsSettings;
 import com.android.server.net.NetworkStatsService.NetworkStatsSettings.Config;
 
diff --git a/tests/net/java/com/android/server/net/ipmemorystore/IpMemoryStoreServiceTest.java b/tests/net/java/com/android/server/net/ipmemorystore/IpMemoryStoreServiceTest.java
index e57433a..be10680 100644
--- a/tests/net/java/com/android/server/net/ipmemorystore/IpMemoryStoreServiceTest.java
+++ b/tests/net/java/com/android/server/net/ipmemorystore/IpMemoryStoreServiceTest.java
@@ -39,9 +39,10 @@
 import android.net.ipmemorystore.StatusParcelable;
 import android.os.IBinder;
 import android.os.RemoteException;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.After;
 import org.junit.Before;
diff --git a/tests/net/java/com/android/server/net/ipmemorystore/NetworkAttributesTest.java b/tests/net/java/com/android/server/net/ipmemorystore/NetworkAttributesTest.java
index fe19eee..dc20185 100644
--- a/tests/net/java/com/android/server/net/ipmemorystore/NetworkAttributesTest.java
+++ b/tests/net/java/com/android/server/net/ipmemorystore/NetworkAttributesTest.java
@@ -19,8 +19,9 @@
 import static org.junit.Assert.assertEquals;
 
 import android.net.ipmemorystore.NetworkAttributes;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/tests/net/java/com/android/server/net/ipmemorystore/RelevanceUtilsTests.java b/tests/net/java/com/android/server/net/ipmemorystore/RelevanceUtilsTests.java
index 8d367e2..7413b91 100644
--- a/tests/net/java/com/android/server/net/ipmemorystore/RelevanceUtilsTests.java
+++ b/tests/net/java/com/android/server/net/ipmemorystore/RelevanceUtilsTests.java
@@ -22,8 +22,8 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;