Merge "Adding tests for KeyboardBacklightListener part of KeyboardRepository" into udc-dev am: 5b657848 am: c23fe120

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22744821



Change-Id: I0271717e413b4c4fb03a659d9fa99dcc4e821306
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>