Switch to mockito-extended

Bug: 113806960
Test: Pass all presubmit tests in WmTests.
  $ tradefed.sh run commandAndExit WmTests \
      --include-annotation android.platform.test.annotations.Presubmit \
      --exclude-annotation androidx.test.filters.FlakyTest
Change-Id: Ie71e0f3d1abb221abf0343606e3d26254e7f9ac8
diff --git a/services/tests/wmtests/src/com/android/server/wm/WindowTestUtils.java b/services/tests/wmtests/src/com/android/server/wm/WindowTestUtils.java
index 3b4ab38..99ec0a9 100644
--- a/services/tests/wmtests/src/com/android/server/wm/WindowTestUtils.java
+++ b/services/tests/wmtests/src/com/android/server/wm/WindowTestUtils.java
@@ -16,14 +16,13 @@
 
 package com.android.server.wm;
 
-import static org.mockito.Mockito.any;
-import static org.mockito.Mockito.anyBoolean;
-import static org.mockito.Mockito.anyFloat;
-import static org.mockito.Mockito.anyInt;
-import static org.mockito.Mockito.doAnswer;
-import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.any;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.anyBoolean;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.anyFloat;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.anyInt;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.doAnswer;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.mock;
+import static com.android.dx.mockito.inline.extended.ExtendedMockito.when;
 
 import android.content.Context;
 import android.content.res.Configuration;
@@ -47,6 +46,14 @@
             super(display, service, wallpaperController, controller);
         }
 
+        /**
+         * Stubbing method of non-public parent class isn't supported, so here explicitly overrides.
+         */
+        @Override
+        public DisplayRotation getDisplayRotation() {
+            return null;
+        }
+
         /** Create a mocked default {@link DisplayContent}. */
         public static TestDisplayContent create(Context context) {
             final TestDisplayContent displayContent = mock(TestDisplayContent.class);