diff --git a/services/tests/servicestests/src/com/android/server/wm/AnimatingAppWindowTokenRegistryTest.java b/services/tests/servicestests/src/com/android/server/wm/AnimatingAppWindowTokenRegistryTest.java
index 164c80b..b5fe8b1 100644
--- a/services/tests/servicestests/src/com/android/server/wm/AnimatingAppWindowTokenRegistryTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/AnimatingAppWindowTokenRegistryTest.java
@@ -18,27 +18,22 @@
 
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
-import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
-import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
+
 import static junit.framework.Assert.assertFalse;
 import static junit.framework.Assert.assertTrue;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNull;
-import static org.mockito.ArgumentMatchers.any;
+
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyZeroInteractions;
 
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 
-import com.android.server.wm.SurfaceAnimator.OnAnimationFinishedCallback;
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
diff --git a/services/tests/servicestests/src/com/android/server/wm/AppTransitionTests.java b/services/tests/servicestests/src/com/android/server/wm/AppTransitionTests.java
index be7d781..3053c41 100644
--- a/services/tests/servicestests/src/com/android/server/wm/AppTransitionTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/AppTransitionTests.java
@@ -20,13 +20,15 @@
 import static android.view.WindowManager.TRANSIT_CRASHING_ACTIVITY_CLOSE;
 import static android.view.WindowManager.TRANSIT_KEYGUARD_GOING_AWAY;
 import static android.view.WindowManager.TRANSIT_KEYGUARD_UNOCCLUDE;
+
 import static org.junit.Assert.assertEquals;
 
 import android.content.Context;
 import android.platform.test.annotations.Presubmit;
-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.Rule;
diff --git a/services/tests/servicestests/src/com/android/server/wm/AppWindowContainerControllerTests.java b/services/tests/servicestests/src/com/android/server/wm/AppWindowContainerControllerTests.java
index e0645b1..fcd8a39e4 100644
--- a/services/tests/servicestests/src/com/android/server/wm/AppWindowContainerControllerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/AppWindowContainerControllerTests.java
@@ -16,26 +16,28 @@
 
 package com.android.server.wm;
 
-import android.support.test.filters.FlakyTest;
-import org.junit.Test;
-
-import android.platform.test.annotations.Presubmit;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
 import static android.content.res.Configuration.EMPTY;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.fail;
 
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.wm.WindowTestUtils.TestTaskWindowContainerController;
 
+import org.junit.Test;
+
 /**
  * Test class for {@link AppWindowContainerController}.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/AppWindowTokenTests.java b/services/tests/servicestests/src/com/android/server/wm/AppWindowTokenTests.java
index e8d8022..6d31dfb 100644
--- a/services/tests/servicestests/src/com/android/server/wm/AppWindowTokenTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/AppWindowTokenTests.java
@@ -16,16 +16,6 @@
 
 package com.android.server.wm;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.view.Surface;
-import android.view.WindowManager;
-
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_BEHIND;
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
@@ -38,6 +28,7 @@
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
 import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
 import static android.view.WindowManager.TRANSIT_UNSET;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNull;
@@ -46,6 +37,17 @@
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.spy;
 
+import android.platform.test.annotations.Presubmit;
+import android.view.Surface;
+import android.view.WindowManager;
+
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 /**
  * Tests for the {@link AppWindowToken} class.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/BoundsAnimationControllerTests.java b/services/tests/servicestests/src/com/android/server/wm/BoundsAnimationControllerTests.java
index 08b522c..12be0b3 100644
--- a/services/tests/servicestests/src/com/android/server/wm/BoundsAnimationControllerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/BoundsAnimationControllerTests.java
@@ -21,34 +21,31 @@
 import static com.android.server.wm.BoundsAnimationController.SCHEDULE_PIP_MODE_CHANGED_ON_START;
 import static com.android.server.wm.BoundsAnimationController.SchedulePipModeChangedState;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
 import android.animation.ValueAnimator;
 import android.content.Context;
 import android.graphics.Rect;
 import android.os.Handler;
 import android.os.Looper;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.annotation.UiThreadTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.annotation.UiThreadTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.server.wm.BoundsAnimationController.BoundsAnimator;
 import com.android.server.wm.WindowManagerInternal.AppTransitionListener;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNotSame;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertSame;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
-import com.android.server.wm.BoundsAnimationController.BoundsAnimator;
-
 /**
  * Test class for {@link BoundsAnimationController} to ensure that it sends the right callbacks
  * depending on the various interactions.
diff --git a/services/tests/servicestests/src/com/android/server/wm/ConfigurationContainerTests.java b/services/tests/servicestests/src/com/android/server/wm/ConfigurationContainerTests.java
index 192e156..2b8214d 100644
--- a/services/tests/servicestests/src/com/android/server/wm/ConfigurationContainerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/ConfigurationContainerTests.java
@@ -28,13 +28,16 @@
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE;
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT;
 import static android.content.res.Configuration.EMPTY;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
 import android.content.res.Configuration;
 import android.platform.test.annotations.Presubmit;
-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/services/tests/servicestests/src/com/android/server/wm/DimmerTests.java b/services/tests/servicestests/src/com/android/server/wm/DimmerTests.java
index 6769e40..21555e3 100644
--- a/services/tests/servicestests/src/com/android/server/wm/DimmerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/DimmerTests.java
@@ -29,10 +29,11 @@
 
 import android.graphics.Rect;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.SurfaceControl;
 import android.view.SurfaceSession;
 
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/services/tests/servicestests/src/com/android/server/wm/DisplayContentTests.java b/services/tests/servicestests/src/com/android/server/wm/DisplayContentTests.java
index ef0e27b..cfef51c 100644
--- a/services/tests/servicestests/src/com/android/server/wm/DisplayContentTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/DisplayContentTests.java
@@ -30,6 +30,7 @@
 import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
 import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR;
 import static android.view.WindowManager.LayoutParams.TYPE_VOICE_INTERACTION;
+
 import static com.android.server.wm.WindowContainer.POSITION_TOP;
 
 import static org.hamcrest.Matchers.is;
@@ -42,25 +43,26 @@
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 import android.annotation.SuppressLint;
 import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.os.SystemClock;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.DisplayMetrics;
 import android.util.SparseIntArray;
 import android.view.DisplayCutout;
 import android.view.MotionEvent;
 import android.view.Surface;
 
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.wm.utils.WmDisplayCutout;
 
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
diff --git a/services/tests/servicestests/src/com/android/server/wm/DisplaySettingsTests.java b/services/tests/servicestests/src/com/android/server/wm/DisplaySettingsTests.java
index 0ea56ed..07eafa5 100644
--- a/services/tests/servicestests/src/com/android/server/wm/DisplaySettingsTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/DisplaySettingsTests.java
@@ -22,12 +22,13 @@
 
 import android.app.WindowConfiguration;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.Display;
 import android.view.DisplayInfo;
 
+import androidx.test.InstrumentationRegistry;
+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/services/tests/servicestests/src/com/android/server/wm/DragDropControllerTests.java b/services/tests/servicestests/src/com/android/server/wm/DragDropControllerTests.java
index a09656c..f383fda 100644
--- a/services/tests/servicestests/src/com/android/server/wm/DragDropControllerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/DragDropControllerTests.java
@@ -19,6 +19,7 @@
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
+
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Mockito.any;
@@ -33,21 +34,25 @@
 import android.os.UserHandle;
 import android.os.UserManagerInternal;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.InputChannel;
 import android.view.SurfaceControl;
 import android.view.SurfaceSession;
 import android.view.View;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.annotations.GuardedBy;
 import com.android.server.LocalServices;
-import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.TimeUnit;
+
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
 /**
  * Tests for the {@link DragDropController} class.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/PinnedStackControllerTest.java b/services/tests/servicestests/src/com/android/server/wm/PinnedStackControllerTest.java
index 96745fa..7222a99 100644
--- a/services/tests/servicestests/src/com/android/server/wm/PinnedStackControllerTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/PinnedStackControllerTest.java
@@ -2,18 +2,6 @@
 
 import static android.view.Display.DEFAULT_DISPLAY;
 
-import android.os.RemoteException;
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.view.IPinnedStackListener;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.anyInt;
@@ -23,6 +11,19 @@
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.os.RemoteException;
+import android.platform.test.annotations.Presubmit;
+import android.view.IPinnedStackListener;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
 @SmallTest
 @Presubmit
 @RunWith(AndroidJUnit4.class)
diff --git a/services/tests/servicestests/src/com/android/server/wm/RecentsAnimationControllerTest.java b/services/tests/servicestests/src/com/android/server/wm/RecentsAnimationControllerTest.java
index a2af9b8..e7c45d5 100644
--- a/services/tests/servicestests/src/com/android/server/wm/RecentsAnimationControllerTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/RecentsAnimationControllerTest.java
@@ -19,8 +19,10 @@
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.view.Display.DEFAULT_DISPLAY;
+
 import static com.android.server.wm.RecentsAnimationController.REORDER_KEEP_IN_PLACE;
 import static com.android.server.wm.RecentsAnimationController.REORDER_MOVE_TO_ORIGINAL_POSITION;
+
 import static org.junit.Assert.fail;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.atLeast;
@@ -31,11 +33,14 @@
 import android.os.Binder;
 import android.os.IInterface;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.IRecentsAnimationRunner;
 import android.view.SurfaceControl;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.wm.SurfaceAnimator.OnAnimationFinishedCallback;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/services/tests/servicestests/src/com/android/server/wm/RemoteAnimationControllerTest.java b/services/tests/servicestests/src/com/android/server/wm/RemoteAnimationControllerTest.java
index 95361f0..7d19baa 100644
--- a/services/tests/servicestests/src/com/android/server/wm/RemoteAnimationControllerTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/RemoteAnimationControllerTest.java
@@ -31,9 +31,6 @@
 import android.os.Binder;
 import android.os.IInterface;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.IRemoteAnimationFinishedCallback;
 import android.view.IRemoteAnimationRunner;
 import android.view.RemoteAnimationAdapter;
@@ -41,6 +38,9 @@
 import android.view.SurfaceControl;
 import android.view.SurfaceControl.Transaction;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.testutils.OffsettableClock;
 import com.android.server.testutils.TestHandler;
 import com.android.server.wm.SurfaceAnimator.OnAnimationFinishedCallback;
diff --git a/services/tests/servicestests/src/com/android/server/wm/RootWindowContainerTests.java b/services/tests/servicestests/src/com/android/server/wm/RootWindowContainerTests.java
index 204e26c..c1db6a6 100644
--- a/services/tests/servicestests/src/com/android/server/wm/RootWindowContainerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/RootWindowContainerTests.java
@@ -1,16 +1,16 @@
 package com.android.server.wm;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import static org.junit.Assert.assertTrue;
 
 import android.content.res.Configuration;
 import android.graphics.Rect;
-
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 
-import static org.junit.Assert.assertTrue;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 /**
  * Tests for the {@link RootWindowContainer} class.
diff --git a/services/tests/servicestests/src/com/android/server/wm/ScreenDecorWindowTests.java b/services/tests/servicestests/src/com/android/server/wm/ScreenDecorWindowTests.java
index bfc99c8..60025f0 100644
--- a/services/tests/servicestests/src/com/android/server/wm/ScreenDecorWindowTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/ScreenDecorWindowTests.java
@@ -32,6 +32,7 @@
 import static android.view.WindowManager.LayoutParams.FLAG_WATCH_OUTSIDE_TOUCH;
 import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_IS_SCREEN_DECOR;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
+
 import static org.junit.Assert.assertEquals;
 
 import android.app.Activity;
@@ -46,9 +47,6 @@
 import android.media.ImageReader;
 import android.os.Handler;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.Pair;
 import android.view.Display;
 import android.view.DisplayInfo;
@@ -57,6 +55,10 @@
 import android.view.WindowManager;
 import android.widget.TextView;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.After;
 import org.junit.Assert;
 import org.junit.Before;
diff --git a/services/tests/servicestests/src/com/android/server/wm/StackWindowControllerTests.java b/services/tests/servicestests/src/com/android/server/wm/StackWindowControllerTests.java
index ab0a2bd..9f2645c 100644
--- a/services/tests/servicestests/src/com/android/server/wm/StackWindowControllerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/StackWindowControllerTests.java
@@ -16,20 +16,20 @@
 
 package com.android.server.wm;
 
-import android.graphics.Rect;
-import org.junit.Ignore;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
+import android.graphics.Rect;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 /**
  * Test class for {@link StackWindowController}.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/SurfaceAnimationRunnerTest.java b/services/tests/servicestests/src/com/android/server/wm/SurfaceAnimationRunnerTest.java
index 79e9bb4..4551c36 100644
--- a/services/tests/servicestests/src/com/android/server/wm/SurfaceAnimationRunnerTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/SurfaceAnimationRunnerTest.java
@@ -16,7 +16,6 @@
 
 package com.android.server.wm;
 
-import static java.util.concurrent.TimeUnit.SECONDS;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
@@ -34,9 +33,6 @@
 import android.graphics.Point;
 import android.os.PowerManagerInternal;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.Choreographer;
 import android.view.Choreographer.FrameCallback;
 import android.view.SurfaceControl;
@@ -44,6 +40,10 @@
 import android.view.animation.Animation;
 import android.view.animation.TranslateAnimation;
 
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.wm.LocalAnimationAdapter.AnimationSpec;
 
 import org.junit.Before;
@@ -54,6 +54,8 @@
 import org.mockito.junit.MockitoJUnit;
 import org.mockito.junit.MockitoRule;
 
+import static java.util.concurrent.TimeUnit.SECONDS;
+
 import java.util.concurrent.CountDownLatch;
 
 /**
diff --git a/services/tests/servicestests/src/com/android/server/wm/SurfaceAnimatorTest.java b/services/tests/servicestests/src/com/android/server/wm/SurfaceAnimatorTest.java
index 16b8458..7b5e8de 100644
--- a/services/tests/servicestests/src/com/android/server/wm/SurfaceAnimatorTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/SurfaceAnimatorTest.java
@@ -28,14 +28,15 @@
 import static org.mockito.Mockito.verifyZeroInteractions;
 
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.SurfaceControl;
 import android.view.SurfaceControl.Builder;
 import android.view.SurfaceControl.Transaction;
 import android.view.SurfaceSession;
 
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.wm.SurfaceAnimator.Animatable;
 import com.android.server.wm.SurfaceAnimator.OnAnimationFinishedCallback;
 
@@ -46,8 +47,6 @@
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import java.util.ArrayList;
-
 /**
  * Test class for {@link SurfaceAnimatorTest}.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskPositionerTests.java b/services/tests/servicestests/src/com/android/server/wm/TaskPositionerTests.java
index dc6bbbf..17b7fc1 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskPositionerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskPositionerTests.java
@@ -16,31 +16,32 @@
 
 package com.android.server.wm;
 
-import android.app.IActivityManager;
-import org.junit.Before;
-import org.junit.Ignore;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import android.app.IActivityTaskManager;
-import android.graphics.Rect;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.util.DisplayMetrics;
-import android.util.Log;
-import android.view.Display;
-import org.mockito.Mockito;
-
 import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
 import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
+
 import static com.android.server.wm.TaskPositioner.MIN_ASPECT;
 import static com.android.server.wm.WindowManagerService.dipToPixel;
 import static com.android.server.wm.WindowState.MINIMUM_VISIBLE_HEIGHT_IN_DP;
 import static com.android.server.wm.WindowState.MINIMUM_VISIBLE_WIDTH_IN_DP;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
+import android.app.IActivityTaskManager;
+import android.graphics.Rect;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.Display;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+
 /**
  * Tests for the {@link TaskPositioner} class.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskPositioningControllerTests.java b/services/tests/servicestests/src/com/android/server/wm/TaskPositioningControllerTests.java
index 6070516..ced0847 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskPositioningControllerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskPositioningControllerTests.java
@@ -17,6 +17,7 @@
 package com.android.server.wm;
 
 import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
+
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
@@ -27,9 +28,11 @@
 import static org.mockito.Mockito.when;
 
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.InputChannel;
+
+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/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotCacheTest.java b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotCacheTest.java
index 649de4a..c9d8004 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotCacheTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotCacheTest.java
@@ -17,12 +17,14 @@
 package com.android.server.wm;
 
 import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
+
 import static junit.framework.Assert.assertNotNull;
 import static junit.framework.Assert.assertNull;
 
 import android.platform.test.annotations.Presubmit;
-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/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotControllerTest.java b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotControllerTest.java
index 5650050..efce063 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotControllerTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotControllerTest.java
@@ -19,17 +19,19 @@
 import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
 import static android.view.WindowManager.LayoutParams.FLAG_SECURE;
 import static android.view.WindowManager.TRANSIT_UNSET;
+
 import static com.android.server.wm.TaskSnapshotController.*;
+
 import static junit.framework.Assert.assertEquals;
-import static junit.framework.Assert.assertFalse;
-import static junit.framework.Assert.assertTrue;
 
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.ArraySet;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.google.android.collect.Sets;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotPersisterLoaderTest.java b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotPersisterLoaderTest.java
index 325d42a..600b2e5 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotPersisterLoaderTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotPersisterLoaderTest.java
@@ -18,23 +18,24 @@
 
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.app.WindowConfiguration.WINDOWING_MODE_PINNED;
+
 import static org.junit.Assert.assertEquals;
 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 android.app.ActivityManager.TaskSnapshot;
 import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.os.SystemClock;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.MediumTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.ArraySet;
-
 import android.view.View;
+
+import androidx.test.filters.MediumTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.wm.TaskSnapshotPersister.RemoveObsoleteFilesQueueItem;
 
 import org.junit.Test;
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotPersisterTestBase.java b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotPersisterTestBase.java
index 8b86043..6f4f173 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotPersisterTestBase.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotPersisterTestBase.java
@@ -28,7 +28,8 @@
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
 import android.os.UserManager;
-import android.support.test.InstrumentationRegistry;
+
+import androidx.test.InstrumentationRegistry;
 
 import org.junit.After;
 import org.junit.Before;
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotSurfaceTest.java b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotSurfaceTest.java
index 21402ce..91074b9 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotSurfaceTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotSurfaceTest.java
@@ -19,6 +19,7 @@
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.content.res.Configuration.ORIENTATION_PORTRAIT;
 import static android.view.WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS;
+
 import static org.junit.Assert.assertEquals;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyInt;
@@ -35,10 +36,11 @@
 import android.graphics.PixelFormat;
 import android.graphics.Rect;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.Surface;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.server.wm.TaskSnapshotSurface.Window;
 
 import org.junit.Test;
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskStackContainersTests.java b/services/tests/servicestests/src/com/android/server/wm/TaskStackContainersTests.java
index ca1994f..9fa5ba4 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskStackContainersTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskStackContainersTests.java
@@ -18,20 +18,20 @@
 
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_PINNED;
+
 import static org.junit.Assert.assertEquals;
 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 android.platform.test.annotations.Presubmit;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.After;
+import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
-import org.junit.Before;
-import org.junit.After;
-
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 
 /**
  * Tests for the {@link DisplayContent.TaskStackContainers} container in {@link DisplayContent}.
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskStackTests.java b/services/tests/servicestests/src/com/android/server/wm/TaskStackTests.java
index eaf71f0..53a1185 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskStackTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskStackTests.java
@@ -16,21 +16,19 @@
 
 package com.android.server.wm;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
 
 import static org.junit.Assert.assertEquals;
-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 android.platform.test.annotations.Presubmit;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 /**
  * Tests for the {@link TaskStack} class.
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskWindowContainerControllerTests.java b/services/tests/servicestests/src/com/android/server/wm/TaskWindowContainerControllerTests.java
index 1dd9365..edd7664 100644
--- a/services/tests/servicestests/src/com/android/server/wm/TaskWindowContainerControllerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskWindowContainerControllerTests.java
@@ -16,17 +16,19 @@
 
 package com.android.server.wm;
 
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 /**
  * Test class for {@link TaskWindowContainerController}.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/UnknownAppVisibilityControllerTest.java b/services/tests/servicestests/src/com/android/server/wm/UnknownAppVisibilityControllerTest.java
index a5c47de..3ac97027 100644
--- a/services/tests/servicestests/src/com/android/server/wm/UnknownAppVisibilityControllerTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/UnknownAppVisibilityControllerTest.java
@@ -19,8 +19,9 @@
 import static junit.framework.Assert.assertTrue;
 
 import android.platform.test.annotations.Presubmit;
-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/services/tests/servicestests/src/com/android/server/wm/WallpaperControllerTests.java b/services/tests/servicestests/src/com/android/server/wm/WallpaperControllerTests.java
index 71ead20..882e789 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WallpaperControllerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WallpaperControllerTests.java
@@ -11,8 +11,9 @@
 import android.graphics.Bitmap;
 import android.os.IBinder;
 import android.platform.test.annotations.Presubmit;
-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/services/tests/servicestests/src/com/android/server/wm/WindowAnimationSpecTest.java b/services/tests/servicestests/src/com/android/server/wm/WindowAnimationSpecTest.java
index 9dc0025..827d938 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowAnimationSpecTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowAnimationSpecTest.java
@@ -28,12 +28,13 @@
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.SurfaceControl;
 import android.view.animation.Animation;
 import android.view.animation.ClipRectAnimation;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowConfigurationTests.java b/services/tests/servicestests/src/com/android/server/wm/WindowConfigurationTests.java
index 10d7aad..e7cc285 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowConfigurationTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowConfigurationTests.java
@@ -16,17 +16,6 @@
 
 package com.android.server.wm;
 
-import org.junit.Test;
-
-import android.app.WindowConfiguration;
-import android.content.res.Configuration;
-import android.graphics.Rect;
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.view.DisplayInfo;
-
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_HOME;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
@@ -35,9 +24,21 @@
 import static android.app.WindowConfiguration.WINDOW_CONFIG_APP_BOUNDS;
 import static android.app.WindowConfiguration.WINDOW_CONFIG_WINDOWING_MODE;
 import static android.content.pm.ActivityInfo.CONFIG_WINDOW_CONFIGURATION;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotEquals;
-import static org.junit.Assert.assertTrue;
+
+import android.app.WindowConfiguration;
+import android.content.res.Configuration;
+import android.graphics.Rect;
+import android.platform.test.annotations.Presubmit;
+import android.view.DisplayInfo;
+
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
 
 /**
  * Test class to for {@link android.app.WindowConfiguration}.
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowContainerControllerTests.java b/services/tests/servicestests/src/com/android/server/wm/WindowContainerControllerTests.java
index 502cb6e..6b1feb8 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowContainerControllerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowContainerControllerTests.java
@@ -16,21 +16,22 @@
 
 package com.android.server.wm;
 
-import android.app.WindowConfiguration;
-import android.content.res.Configuration;
-import android.support.test.filters.FlakyTest;
-import org.junit.Test;
-
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
 import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
 import static android.content.res.Configuration.EMPTY;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 
+import android.content.res.Configuration;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+
 /**
  * Test class for {@link WindowContainerController}.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowContainerTests.java b/services/tests/servicestests/src/com/android/server/wm/WindowContainerTests.java
index f8b2828..dc763b9 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowContainerTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowContainerTests.java
@@ -16,20 +16,6 @@
 
 package com.android.server.wm;
 
-import android.support.test.filters.FlakyTest;
-import android.view.SurfaceControl;
-import android.view.SurfaceSession;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import android.content.res.Configuration;
-import android.graphics.Rect;
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
-import java.util.Comparator;
-
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_BEHIND;
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
 import static android.content.pm.ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
@@ -44,7 +30,6 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
-
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.anyFloat;
 import static org.mockito.Mockito.eq;
@@ -53,6 +38,21 @@
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
+import android.content.res.Configuration;
+import android.graphics.Rect;
+import android.platform.test.annotations.Presubmit;
+import android.view.SurfaceControl;
+import android.view.SurfaceSession;
+
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Comparator;
+
 /**
  * Test class for {@link WindowContainer}.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowContainerTraversalTests.java b/services/tests/servicestests/src/com/android/server/wm/WindowContainerTraversalTests.java
index e076399..ffc8622 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowContainerTraversalTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowContainerTraversalTests.java
@@ -20,19 +20,19 @@
 import static android.app.WindowConfiguration.WINDOWING_MODE_SPLIT_SCREEN_PRIMARY;
 import static android.app.WindowConfiguration.WINDOWING_MODE_SPLIT_SCREEN_SECONDARY;
 import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
+
+import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.verify;
-import static org.mockito.Matchers.eq;
 
 import android.platform.test.annotations.Presubmit;
-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 org.mockito.Mock;
-
 import java.util.function.Consumer;
 
 /**
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowFrameTests.java b/services/tests/servicestests/src/com/android/server/wm/WindowFrameTests.java
index 431d1a7..ea3a3d0 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowFrameTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowFrameTests.java
@@ -16,29 +16,31 @@
 
 package com.android.server.wm;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
+import static android.view.DisplayCutout.fromBoundingRect;
+import static android.view.WindowManager.LayoutParams.FILL_PARENT;
+import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
 
 import android.app.ActivityManager.TaskDescription;
 import android.content.res.Configuration;
 import android.graphics.Rect;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.DisplayInfo;
 import android.view.Gravity;
 import android.view.IWindow;
 import android.view.WindowManager;
 
-import static android.view.DisplayCutout.fromBoundingRect;
-import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
-import static android.view.WindowManager.LayoutParams.FILL_PARENT;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import com.android.server.wm.utils.WmDisplayCutout;
 
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 /**
  * Tests for the {@link WindowState#computeFrameLw} method and other window frame machinery.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowManagerServiceRule.java b/services/tests/servicestests/src/com/android/server/wm/WindowManagerServiceRule.java
index d13c3c9..6664756 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowManagerServiceRule.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowManagerServiceRule.java
@@ -33,9 +33,10 @@
 import android.hardware.display.DisplayManagerInternal;
 import android.os.PowerManagerInternal;
 import android.os.PowerSaveState;
-import android.support.test.InstrumentationRegistry;
 import android.view.InputChannel;
 
+import androidx.test.InstrumentationRegistry;
+
 import com.android.server.LocalServices;
 import com.android.server.input.InputManagerService;
 import com.android.server.policy.WindowManagerPolicy;
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowManagerServiceRuleTest.java b/services/tests/servicestests/src/com/android/server/wm/WindowManagerServiceRuleTest.java
index 6cf6d7b..570a853 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowManagerServiceRuleTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowManagerServiceRuleTest.java
@@ -20,8 +20,9 @@
 import static org.junit.Assert.assertThat;
 
 import android.platform.test.annotations.Presubmit;
-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.Rule;
 import org.junit.Test;
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowStateTests.java b/services/tests/servicestests/src/com/android/server/wm/WindowStateTests.java
index 0ddba6a..645015f 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowStateTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowStateTests.java
@@ -16,19 +16,6 @@
 
 package com.android.server.wm;
 
-import android.graphics.Rect;
-import android.view.SurfaceControl;
-import android.view.WindowManager;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
-import java.util.LinkedList;
-
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.hardware.camera2.params.OutputConfiguration.ROTATION_90;
@@ -52,7 +39,6 @@
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
-import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyLong;
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.mock;
@@ -61,6 +47,20 @@
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 
+import android.graphics.Rect;
+import android.platform.test.annotations.Presubmit;
+import android.view.SurfaceControl;
+import android.view.WindowManager;
+
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.LinkedList;
+
 /**
  * Tests for the {@link WindowState} class.
  *
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowSurfacePlacerTest.java b/services/tests/servicestests/src/com/android/server/wm/WindowSurfacePlacerTest.java
index e173b7d..057f047 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowSurfacePlacerTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowSurfacePlacerTest.java
@@ -20,13 +20,15 @@
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.view.WindowManager.TRANSIT_TASK_CLOSE;
 import static android.view.WindowManager.TRANSIT_TASK_OPEN;
+
 import static junit.framework.Assert.assertEquals;
 
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.WindowManager;
 
+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/services/tests/servicestests/src/com/android/server/wm/WindowTestsBase.java b/services/tests/servicestests/src/com/android/server/wm/WindowTestsBase.java
index ef019fe..d128363 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowTestsBase.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowTestsBase.java
@@ -16,30 +16,12 @@
 
 package com.android.server.wm;
 
+import static android.app.AppOpsManager.OP_NONE;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_STANDARD;
 import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
 import static android.view.Display.DEFAULT_DISPLAY;
-import static android.view.View.VISIBLE;
-
-import android.content.res.Configuration;
-import android.graphics.Rect;
-import android.hardware.display.DisplayManagerGlobal;
-import android.testing.DexmakerShareClassLoaderRule;
-import android.util.Log;
-import android.view.Display;
-import android.view.DisplayInfo;
-import org.junit.Assert;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Rule;
-
-import android.content.Context;
-import android.support.test.InstrumentationRegistry;
-import android.view.IWindow;
-import android.view.WindowManager;
-
-import static android.app.AppOpsManager.OP_NONE;
 import static android.view.DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS;
+import static android.view.View.VISIBLE;
 import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
 import static android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
 import static android.view.WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
@@ -52,10 +34,29 @@
 import static android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR;
 import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR;
 import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;
+
 import static org.mockito.Mockito.mock;
 
+import android.content.Context;
+import android.content.res.Configuration;
+import android.graphics.Rect;
+import android.hardware.display.DisplayManagerGlobal;
+import android.testing.DexmakerShareClassLoaderRule;
+import android.util.Log;
+import android.view.Display;
+import android.view.DisplayInfo;
+import android.view.IWindow;
+import android.view.WindowManager;
+
+import androidx.test.InstrumentationRegistry;
+
 import com.android.server.AttributeCache;
 
+import org.junit.After;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Rule;
+
 import java.util.HashSet;
 import java.util.LinkedList;
 
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowTokenTests.java b/services/tests/servicestests/src/com/android/server/wm/WindowTokenTests.java
index e3b7174..3732486 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowTokenTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowTokenTests.java
@@ -16,23 +16,24 @@
 
 package com.android.server.wm;
 
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-
 import static android.view.WindowManager.LayoutParams.FIRST_SUB_WINDOW;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION;
 import static android.view.WindowManager.LayoutParams.TYPE_TOAST;
+
 import static org.junit.Assert.assertEquals;
 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.mockito.Mockito.mock;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
 
 /**
  * Tests for the {@link WindowToken} class.
diff --git a/services/tests/servicestests/src/com/android/server/wm/WindowTracingTest.java b/services/tests/servicestests/src/com/android/server/wm/WindowTracingTest.java
index 5085254..bbc6550 100644
--- a/services/tests/servicestests/src/com/android/server/wm/WindowTracingTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/WindowTracingTest.java
@@ -29,12 +29,13 @@
 
 import android.content.Context;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.InstrumentationRegistry;
-import android.support.test.filters.SmallTest;
-import android.support.test.filters.FlakyTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.proto.ProtoOutputStream;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.internal.util.Preconditions;
 import com.android.server.wm.WindowManagerTraceProto;
 
diff --git a/services/tests/servicestests/src/com/android/server/wm/ZOrderingTests.java b/services/tests/servicestests/src/com/android/server/wm/ZOrderingTests.java
index 547be55..8f9fb1b 100644
--- a/services/tests/servicestests/src/com/android/server/wm/ZOrderingTests.java
+++ b/services/tests/servicestests/src/com/android/server/wm/ZOrderingTests.java
@@ -27,19 +27,19 @@
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA;
 import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY;
 import static android.view.WindowManager.LayoutParams.TYPE_BASE_APPLICATION;
-import static android.view.WindowManager.LayoutParams.TYPE_DOCK_DIVIDER;
 import static android.view.WindowManager.LayoutParams.TYPE_NAVIGATION_BAR_PANEL;
 import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_PANEL;
 import static android.view.WindowManager.LayoutParams.TYPE_STATUS_BAR_SUB_PANEL;
 import static android.view.WindowManager.LayoutParams.TYPE_SYSTEM_OVERLAY;
 
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.filters.FlakyTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.view.SurfaceControl;
 import android.view.SurfaceSession;
 
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.After;
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/services/tests/servicestests/src/com/android/server/wm/utils/InsetUtilsTest.java b/services/tests/servicestests/src/com/android/server/wm/utils/InsetUtilsTest.java
index d0f0fe3..75b4d2f 100644
--- a/services/tests/servicestests/src/com/android/server/wm/utils/InsetUtilsTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/utils/InsetUtilsTest.java
@@ -20,9 +20,9 @@
 
 import android.graphics.Rect;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
-import android.util.Pair;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/services/tests/servicestests/src/com/android/server/wm/utils/RotationCacheTest.java b/services/tests/servicestests/src/com/android/server/wm/utils/RotationCacheTest.java
index 6bbc7eb..5d08920 100644
--- a/services/tests/servicestests/src/com/android/server/wm/utils/RotationCacheTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/utils/RotationCacheTest.java
@@ -24,14 +24,12 @@
 import static org.junit.Assert.assertThat;
 
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.FlakyTest;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.Pair;
 
-import com.android.server.wm.utils.RotationCache.RotationDependentComputation;
+import androidx.test.filters.FlakyTest;
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
 
-import org.hamcrest.Matchers;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/services/tests/servicestests/src/com/android/server/wm/utils/WmDisplayCutoutTest.java b/services/tests/servicestests/src/com/android/server/wm/utils/WmDisplayCutoutTest.java
index f7addf6..9ce3dca 100644
--- a/services/tests/servicestests/src/com/android/server/wm/utils/WmDisplayCutoutTest.java
+++ b/services/tests/servicestests/src/com/android/server/wm/utils/WmDisplayCutoutTest.java
@@ -25,11 +25,12 @@
 
 import android.graphics.Rect;
 import android.platform.test.annotations.Presubmit;
-import android.support.test.filters.SmallTest;
-import android.support.test.runner.AndroidJUnit4;
 import android.util.Size;
 import android.view.DisplayCutout;
 
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;