Allows APN to be unthrottled through an indication

* Exposed new radio indication that can unthrottle an APN

Test: N/a
Bug: 167434852
Change-Id: Id9ffbd80c5d7f9bcd46caee7cfe5435f15b91fd9

telephony/java/com/android/internal/telephony/RILConstants.java

@@ -551,6 +551,7 @@ public interface RILConstants {
     int RIL_UNSOL_CARRIER_INFO_IMSI_ENCRYPTION = 1048;
     int RIL_UNSOL_NETWORK_SCAN_RESULT = 1049;
     int RIL_UNSOL_KEEPALIVE_STATUS = 1050;
+    int RIL_UNSOL_UNTHROTTLE_APN = 1052;
 
     /* The following unsols are not defined in RIL.h */
     int RIL_UNSOL_HAL_NON_RIL_BASE = 1100;