Merge "Activate flag for Light Reveal Effect" into udc-dev am: 53ea0747ff

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23088356

Change-Id: Iefc6fa33c92e0ec59da404ef51ab4f4751f0c84c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>