Merge "Add id for keyboard backlight container" into udc-dev am: 1a1cc48d...

Merge "Add id for keyboard backlight container" into udc-dev am: 1a1cc48d am: fed2847b am: ef9bbf64 am: 25619679

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22907721



Change-Id: I829b7b14cca560928e0260cd1b991077aa5c9749
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>