Merge "Add elevation to dream home controls button." into udc-dev am: 22490466 am: 158d6e40

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



Change-Id: I5292aab91c5485528df80767b5ddfea66129c1af
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>