Merge "Add basic structure for keyboard backlight indicator functionality"...

Merge "Add basic structure for keyboard backlight indicator functionality" into tm-qpr-dev am: 44aa0c7f

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21540952



Change-Id: I36f18ca362cbf7f4eed8e1eec4896246f06486cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>