Merge "Notification playback: pause on release" into sc-dev am: e198354a0c am: 1893dc2843 am: 4349882af3

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

Change-Id: I77578978375ac9a46ea0d5a4bdfe4f5538ffd3ab