public NetworkEvents enableInternetCheck() {
    networkConnectionChangeReceiver.enableInternetCheck();
    return this;
  }
Enables internet connection check.
when it's not called, WIFI_CONNECTED_HAS_INTERNET
and WIFI_CONNECTED_HAS_NO_INTERNET ConnectivityStatus will never be set
Please, be careful! Internet connection check may contain bugs
that's why it's disabled by default.

@return NetworkEvents object
network-events-library/src/main/java/com/github/pwittchen/networkevents/library/NetworkEvents.java