Fix exported property on NotificationBroadcastReceiver.

"exported" property was missing "android:" prefix and as a result was
not being respected.

bug:11367588
Change-Id: I71b851c94306a2ac4b727a735de07103eb35b6e6
(cherry picked from commit 0c88ac2ffff5472f49f48cad08e89215ec737c16)
1 file changed