Merge "Add id for keyboard backlight container" into udc-dev am: 1a1cc48d am: de94ff7c am: 7345bc77

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



Change-Id: I6ca6b70fa8b63c87661c6053f0fdab120ce9e340
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>