Merge "[Media TTT] [a11y] hide container view before animation" into tm-qpr-dev am: 07592b0b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21352183



Change-Id: I0c48cc9f311e0a407ed36972e334e182504c9103
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>