Merge "Notification playback: pause on release" into sc-dev am: e198354a am: 1893dc28 am: 4349882a am: a53ecce1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15505426

Change-Id: I36eef0dc286190e125636f304c5f4a91caa405c8