Changes to RIL to support IMS features for LTE.

- There is a new RIL request, RIL_REQUEST_ISIM_AUTHENTICATION, which is
  used to perform IMS AKA authentication using the algorithm on the ISIM
  application of the UICC. The challenge nonce and response are both encoded
  as Base64 strings.

Change-Id: I072b43d2b66b2013f8e58d3bd8251d75a453f167
diff --git a/libril/ril.cpp b/libril/ril.cpp
index e45827a..dec5507 100644
--- a/libril/ril.cpp
+++ b/libril/ril.cpp
@@ -3191,6 +3191,7 @@
         case RIL_REQUEST_REPORT_SMS_MEMORY_STATUS: return "REPORT_SMS_MEMORY_STATUS";
         case RIL_REQUEST_REPORT_STK_SERVICE_IS_RUNNING: return "REPORT_STK_SERVICE_IS_RUNNING";
         case RIL_REQUEST_CDMA_GET_SUBSCRIPTION_SOURCE: return "CDMA_GET_SUBSCRIPTION_SOURCE";
+        case RIL_REQUEST_ISIM_AUTHENTICATION: return "ISIM_AUTHENTICATION";
         case RIL_UNSOL_RESPONSE_RADIO_STATE_CHANGED: return "UNSOL_RESPONSE_RADIO_STATE_CHANGED";
         case RIL_UNSOL_RESPONSE_CALL_STATE_CHANGED: return "UNSOL_RESPONSE_CALL_STATE_CHANGED";
         case RIL_UNSOL_RESPONSE_VOICE_NETWORK_STATE_CHANGED: return "UNSOL_RESPONSE_VOICE_NETWORK_STATE_CHANGED";