Merge "Fix ActivityEmbedding placeholder launching above fullscreen activity"...

Merge "Fix ActivityEmbedding placeholder launching above fullscreen activity" into tm-qpr-dev am: 4706a5c6 am: 058fef73

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20647614



Change-Id: I308413b4c294a90e2fd85fbbd65737d3f57735a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>