Merge "Plumb Scene-transition tag through shell transitions" into udc-dev am:...

Merge "Plumb Scene-transition tag through shell transitions" into udc-dev am: de91c389 am: 93478e5c am: 6c0ad574 am: d1ce78ce

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22934736



Change-Id: I8531d19d39f78c31a24e51efa955e8b8269fe75d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>