Add RIL Error code list

    int NO_SMS_TO_ACK = 48;                   /* ACK received when there is no SMS to ack */

    int NETWORK_ERR = 49;                     /* Received error from network */

    int REQUEST_RATE_LIMITED = 50;            /* Operation denied due to overly-frequent requests */

    int SIM_BUSY = 51;                        /* SIM is busy */

    int SIM_FULL = 52;                        /* The target EF is full */

    int NETWORK_REJECT = 53;                  /* Request is rejected by network */

    int OPERATION_NOT_ALLOWED = 54,           /* Not allowed the request now */

    int EMPTY_RECORD = 55,                    /* The request record is empty */

    // 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;