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: de94ff7c am: 7345bc77 am: 2a479611

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



Change-Id: Ica31852a93b2df17df0b2fe2d0b54e4be187ad11
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>