Merge "Animate screenshot dismiss button appearance" into rvc-dev am: 0d3440f4 am: d9fffd42 am: 387566cd am: 7f9ea3a0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11811380

Change-Id: I40e086b005100ab4699e0af2701f3a0cd54ac3db