Merge "Add alpha animation for 180 rotation" into rvc-dev am: 04e81462ce am: 97f1666c1b am: 377189b434 am: 653664893d

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

Change-Id: Iba993e17e1f3f89d5b2fe7bec6d2b869617314a7