Merge "show WSA when ready when using shell transitions" into tm-qpr-dev am:...

Merge "show WSA when ready when using shell transitions" into tm-qpr-dev am: 2da86beb am: 4aaea326

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18327072



Change-Id: Id2efae34557610dbc4bd7af3146cdecce9572091
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>