Interface changes to support Multi SIM functionality.

Add support for
    RIL_REQUEST_SET_UICC_SUBSCRIPTION
    RIL_REQUEST_SET_DATA_SUBSCRIPTION
    RIL_UNSOL_UICC_SUBSCRIPTION_STATUS_CHANGED

Change-Id: I21ac55007610e6695c7f798db16f1d47b143c9e9

Conflicts:
	include/telephony/ril.h
	libril/ril.cpp
(cherry picked from commit cd388722d9fe05760ee4ab4c24e6e1fd832aa676)
3 files changed