overlay: use overlays based on mcc and mnc.

Added support for (cdma) sprint and vzw.

enable config_enabled_lte for sprint.
enable config_apn_expand for sprint.
enable config_show_cdma for sprint.

Change-Id: I28c114e58a133d8aeee52ecb86e61d56d3999f06
m7-common: move Phone overlays to Telephony

Change-Id: I444db57cd40f18229c5c2d6733d1fe6b08bbbc26
m7-common: verizon: enable mms content disposition field

Change-Id: I21786bc5c9a2790ae177c62608b71f79dd6bb627
Slim : Disable some overlays we don't support yet

Change-Id: I6e0211c9177ac685718ab64284509ab8885823a3
m7-common: remove GPU params

Change-Id: Ieb906d02c4f5fcd89d81e972923f5fd3c5c3ebac