bachinger 932bed1f79 Implement SystemUI contract for media resumption
When a `MediaButtonReceiver` is found in the manifest, the library
can implement the contract of SystemUI to signal that the app wants
a playback resumption notification to be displayed.

And, vice versa, if no `MediaButtonReceiver` is in the manifest, the
library will signal to not show the notification after the app has been
terminated.

#minor-release

PiperOrigin-RevId: 531516023
(cherry picked from commit 9bf6b7ea2062435970cea132c295659b48508b4e)
2023-05-17 16:59:54 +00:00
..