Fix clicking on close (x) in notification does nothing when player has
neither playing nor paused state.
Signed-off-by: Yahor Berdnikau <egorr.berd@gmail.com>
Move all logic to the DownloadServiceImpl as it is not a responsibility of SubsonicTabActivity to do it.
Also NotificationCompat.Builder to build notification as now it is a standard way to do it.
Signed-off-by: Yahor Berdnikau <egorr.berd@gmail.com>