Connect reporting

MQTT connection success message reporting

When the MQTT connection is successful, the terminal will send the following connection information to the MQTT server

{
    "dvsno":"xxx",
    "kind":"CON",
    "netip":"10.135.45.62",
    "iip":"0.0.0.0",
    "network":"NET",
    "iccid":"",
    "imei":"",
    "rssi":"",
    "realip":""
}