Merge "Add elevation to dream home controls button." into udc-dev am: 22490466

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23003559



Change-Id: Icc91a5c8a32aec858596f0a85fcb51175a430630
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>