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

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



Change-Id: Ia952f55f512c01670c476b323d6c005581a0d27c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>