The NotificationPlayer sets an OnCompletionListener on the
MediaPlayer it's using to play the notification.
NotificationPlayer relies on the completion event to abandon
audio focus.
The player was started before the listener was set. The theory
about the bug is that the player finished playing before the listener
was called. Therefore the audio focus was never abandonned, and
the music didn't resume.
Change-Id: Ic3baf359ea24de0d832a655dc47e745b25bc3dec
This change introduces the NotificationPlayer class which was
created from the code of android.media.AsyncPlayer. The only modification
was to modify the construction of the MediaPlayer so it properly issues
onCompletion notifications (which are used to abandon audio focus).
Unless the sound to be played is looped, the notification is transient
and other apps may duck (uses AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK in
audio focus request).
Change-Id: I69cbb71d0892447b934351384e4e24a2e239295b
