Generic multi-carrier overlays based on hammerhead

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

Change-Id: Icfd6f168fe7bed2a906267cd052335abd0867663

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

Change-Id: I24c9ab498cf4058367987cfe12513c4adddb7543

Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>