Merge "Interact with DreamOverlay through distinct clients." into tm-qpr-dev am: b928049681

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21109634

Change-Id: I0af679eec698420ed6f6899e8da4da9eb617ec8b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>