Merge "Media transition must crossfade when transitioning to transparent" into...

Merge "Media transition must crossfade when transitioning to transparent" into tm-dev am: 8b5e8952

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18883841



Change-Id: Ibe9687a3ae5e9aa46e72aa1a5bcb36a482107246
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>