Merge "Fix blur region alpha not fading during animations" into sc-dev am:...

Merge "Fix blur region alpha not fading during animations" into sc-dev am: 3cf2e023 am: dd95f836 am: 4c520b7c

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

Change-Id: I65a35390b96fe15524c088f30924d957e3d2f3f4