Merge "Show bg color during ActivityEmbedding change anim with Shell...

Merge "Show bg color during ActivityEmbedding change anim with Shell transition" into tm-qpr-dev am: 96e8a788 am: 3b980cd5

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20235230



Change-Id: Ia36226ec36bbc03036adf8c77ed595ebe1359656
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>