Merge "Notification playback: pause on release" into sc-dev am: e198354a am: 1893dc28 am: 9cfdca44 am: da668848

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

Change-Id: I85e6734bae8ab0f51f9a32bbb2ad6ff415c45db9