Add SMS Middleware layer.

Add fix so ordered broadcasts are delivered to system
apps first in the event of a tie. This works around
the issue where terrible apps steal SMS notifications
from the broadcast queue to simply prevent notifications
that could otherwise be removed by a toggle.

Change-Id: I4fff0c584f8fce9c5f2f4fe86a82fe6480c307c7
New Event: ACTION_NEW_OUTGOING_SMS

Change-Id: I8be01ad6251ca25e4d00ebffd876bb6ce7f3c283
FileUtils: add method to get UUID of a volume

Change-Id: I41b76c5e01c82a2f8e67b33133a76947877a2814