Merge "Merge "Only run Animation#setBackdropColor on overriden app transition" into tm-dev am: 2b70f83f am: db00c303 am: 791a4390" into tm-qpr-dev-plus-aosp am: 29885843

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17983851



Change-Id: Ib9eab7ace5911ec573673012866e6e4f13f61a99
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>