Merge "Add alpha animation for 180 rotation" into rvc-dev am: 04e81462 am: 97f1666c am: 377189b4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12033206

Change-Id: If992b27f9906d0f80059327e82c6ff1f49d42356