Use Log.isLoggable() to enable logs at runtime. Implement SmsResponse.toString()
so we can see what's returned.
Hopefully helps with debugging b/2086832.
1. The authType should be specified in the APN database.
This was hardcoded to 3 in the qmi driver. We currently set it to
3 in the RIL till the apn database side changes are done.
2. RIL_SEND_SMS response has errorCode as a new field,