telephony: Use reflection to create command interface (RIL class)

Change-Id: Icdc02eaa74b89dbde4ddfb989cc62481d6423312
telephony: Reintroduce the old ICS RadioStates

All the previous SIM/RUIM states are now equivalent to "RADIO_ON".
Tested with a fully ICS-compliant set of radio libraries, and appears
to work fully.

Change-Id: Id34320c59a316e2b6747bd3a48077b863ab772d6