Merge "Rename Light HAL default implementation variable." am: b6eba859a1

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2199722

Change-Id: I6281f42bdba7e003c41d48b70620fac870ede0f7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>