Merge "Fix out of sync sysprop flag for backlight animation" into udc-qpr-dev...

Merge "Fix out of sync sysprop flag for backlight animation" into udc-qpr-dev am: 914e1547 am: c9f79ed0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23051398



Change-Id: Icf83c92f1383fd06c397e38bc4d8328953aaa378
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>