Mms: adds the option to hide sprints vm text messages, but still allows sprints vvm to receive messages.

This fixes the missing code form the merge.
Patchset2: Add braces and fix import.

Change-Id: I7ffe257ee7df05324183c6985157fef94847bda1

Conflicts:
	src/com/android/mms/transaction/MessagingNotification.java