Telephony: SMS over IMS

Add RIL_REQUEST_IMS_REGISTRATION_STATE, RIL_REQUEST_IMS_SEND_SMS, and
RIL_UNSOL_RESPONSE_IMS_NETWORK_STATE_CHANGED.  Add FORMAT_UNKNOWN to
SmsConstants.

Bug: 9626411
Change-Id: I87ca9841b4ace931c55e2d379fe6d7589b2dc8a5
Signed-off-by: Ed Tam <etam@google.com>
3 files changed