ril: Support for SEEK on Android

Support the following ril requests to enable
SEEK on Android:
1. RIL_REQUEST_SIM_TRNASMIT_BASIC
2. RIL_REQUEST_SIM_OPEN_CHANNEL
3. RIL_REQUEST_SIM_CLOSE_CHANNEL
4. RIL_REQUEST_SIM_TRANSMIT_CHANNEL
5. RIL_REQUEST_SIM_GET_ATR

Change-Id: I3f346a054c53652db58a1eba93e9d5574157d2cd