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

Set BOARD_RIL_NO_SEEK := true if your board's libril
blob expects the first member of the SIM_IO struct
to be the command, rather than class.

Change-Id: I9af880a2bab986b3e234e1f432657a263ccd7af7