Merge "Test Recents Transition sleep re-entry" into udc-dev

...om/android/wm/shell/recents/RecentsTransitionHandler.java

libs/WindowManager/Shell/tests/unittest/Android.bp

...com/android/wm/shell/transition/ShellTransitionTests.java

...s/utils/com/android/server/testutils/StubTransaction.java

.../tests/wmtests/src/com/android/server/wm/DimmerTests.java

...ests/wmtests/src/com/android/server/wm/LetterboxTest.java

...tests/src/com/android/server/wm/SurfaceSyncGroupTest.java

...ts/wmtests/src/com/android/server/wm/SyncEngineTests.java

...sts/src/com/android/server/wm/SystemServicesTestRule.java

...ts/src/com/android/server/wm/WindowAnimationSpecTest.java

...c/com/android/server/wm/WindowContainerThumbnailTest.java

...s/wmtests/src/com/android/server/wm/WindowStateTests.java