Merge "Prevent alpha transitions from clipping out-of-bounds clocks" into udc-dev am: 5623c50b am: 5cf665d4 am: d87edb7a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23149088



Change-Id: Id5a47eb115ce7a594606f42cf214d216f53f507c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>