Mms auto-retrieval (3/3): mms app

Change-Id: I32b6d46aa43d3cb96125d8a8264f3fc9e6d3f18c

It's only porting this http://review.cyanogenmod.org/#/c/26167/
Part 3 of 3

Conflicts:

	src/com/android/mms/ui/MessagingPreferenceActivity.java