diff --git a/core/java/android/net/IConnectivityManager.aidl b/core/java/android/net/IConnectivityManager.aidl
index 28b0867..ad903d9 100644
--- a/core/java/android/net/IConnectivityManager.aidl
+++ b/core/java/android/net/IConnectivityManager.aidl
@@ -47,10 +47,12 @@
 {
     Network getActiveNetwork();
     Network getActiveNetworkForUid(int uid, boolean ignoreBlocked);
+    @UnsupportedAppUsage
     NetworkInfo getActiveNetworkInfo();
     NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked);
     NetworkInfo getNetworkInfo(int networkType);
     NetworkInfo getNetworkInfoForUid(in Network network, int uid, boolean ignoreBlocked);
+    @UnsupportedAppUsage
     NetworkInfo[] getAllNetworkInfo();
     Network getNetworkForType(int networkType);
     Network[] getAllNetworks();
@@ -58,12 +60,14 @@
 
     boolean isNetworkSupported(int networkType);
 
+    @UnsupportedAppUsage
     LinkProperties getActiveLinkProperties();
     LinkProperties getLinkPropertiesForType(int networkType);
     LinkProperties getLinkProperties(in Network network);
 
     NetworkCapabilities getNetworkCapabilities(in Network network);
 
+    @UnsupportedAppUsage
     NetworkState[] getAllNetworkState();
 
     NetworkQuotaInfo getActiveNetworkQuotaInfo();
@@ -75,6 +79,7 @@
 
     int untether(String iface, String callerPkg);
 
+    @UnsupportedAppUsage
     int getLastTetherError(String iface);
 
     boolean isTetheringSupported(String callerPkg);
@@ -84,16 +89,21 @@
 
     void stopTethering(int type, String callerPkg);
 
+    @UnsupportedAppUsage
     String[] getTetherableIfaces();
 
+    @UnsupportedAppUsage
     String[] getTetheredIfaces();
 
+    @UnsupportedAppUsage
     String[] getTetheringErroredIfaces();
 
     String[] getTetheredDhcpRanges();
 
+    @UnsupportedAppUsage
     String[] getTetherableUsbRegexs();
 
+    @UnsupportedAppUsage
     String[] getTetherableWifiRegexs();
 
     String[] getTetherableBluetoothRegexs();
@@ -118,6 +128,7 @@
 
     VpnConfig getVpnConfig(int userId);
 
+    @UnsupportedAppUsage
     void startLegacyVpn(in VpnProfile profile);
 
     LegacyVpnInfo getLegacyVpnInfo(int userId);
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/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/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/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/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/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/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/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;