Generic multi-carrier overlays based on hammerhead

 -Added Sprint MWI quirk to 310120
 -Added Verizion specific eri file

Multi-carrier overlays: Fix Mms
 -Set default uaProfUrl which can then be overridden
 -Add verizon eri for 31099

Change-Id: I5e75ab11fe5de4898de07065a2b54dbd5af6bf82