Merge "[sf] Fix blur alpha for new sf frontend" into udc-dev am: 82b2856549 am: 3f7fb922c7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22578934

Change-Id: I138737f1695eaade78fefa472ec5e7fda673eb10
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>