Add Constants for NATT Keepalive to RILConstants

    int DEVICE_IN_USE = 64;                   /* Operation cannot be performed because the device

                                                 is currently in use */

    int ABORTED = 65;                         /* Operation aborted */

    int INVALID_RESPONSE = 66;                /* Invalid response sent by vendor code */

    // Below is list of OEM specific error codes which can by used by OEMs in case they don't want to

    // reveal particular replacement for Generic failure

    int OEM_ERROR_1 = 501;

    int RIL_REQUEST_STOP_NETWORK_SCAN = 143;

    int RIL_REQUEST_GET_SLOT_STATUS = 144;

    int RIL_REQUEST_SET_LOGICAL_TO_PHYSICAL_SLOT_MAPPING = 145;

    int RIL_REQUEST_START_KEEPALIVE = 146;

    int RIL_REQUEST_STOP_KEEPALIVE = 147;

    int RIL_RESPONSE_ACKNOWLEDGEMENT = 800;

    int RIL_UNSOL_CARRIER_INFO_IMSI_ENCRYPTION = 1048;

    int RIL_UNSOL_NETWORK_SCAN_RESULT = 1049;

    int RIL_UNSOL_ICC_SLOT_STATUS = 1050;

    int RIL_UNSOL_KEEPALIVE_STATUS = 1051;

}