Add to NotificationListenerService: - getActiveNotificationKeys() : String[] - getActiveNotifications(String[] keys) : StatusBarNotification[] - cancelNotifications(String[] keys) : void - onListenerConnected(String[] keys) : void Add to StatusBarNotification: - getKey() : String Bug:13562828 Change-Id: I9da222cb4af22864bc0ecdecc3f121bced0723d6