Fix VZW MMS

Without the inclusion of type mms and appropriate mmsc url mms is not functioning in CM10.2 or CM11 builds for at least some VZW users. On CM10.2 users fixed this manually by updating their APN, but with it currently restricted in CM11 users are now modifying system files.

The 3 lines changed were set to match my XT912 on stock 4.1.2. Using these 3 lines as my custom APN list I have had solid MMS support with CM11.