Merge "Fix blur region alpha not fading during animations" into sc-dev am: 3cf2e023 am: 6a51ee42 am: 49371304

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15013550

Change-Id: Icdd0fb0c3697b3575665683577b9ea37a813861a