Merge "Implement dream out overlay transition" into tm-qpr-dev am: 620f597d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20377749



Change-Id: I8d57aaafd589a72f915c89a9176ae634bfb19c9c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>