Once a service is started as a foreground service, it must
be started into the foreground. This means an app can not
suppress a play command arriving from the `MediaButtonReceiver`
once the receiver has started the service.
This change adds a method to the `MediaButtonReceiver` that
allows app to suppress starting the service to not get into
this situation of wanting to suppress the play command after
the service is already started.
Issue: androidx/media#1528
PiperOrigin-RevId: 650280025
06d61ffaaa