title: onDataConnectionStateChanged state param is always 0
body: <p>I am trying to use PhoneStateListener to handle connection state changes. I've registered the listener inside onCreate method of a service. The overriden method onDataConnectionStateChanged(int state) of the listener is being called when I enable or disable wifi connection from the phone' settings, but in both cases the 'state' param is 0 and it always enters the first case of the switch.
  Here's my implementation of the method:</p>
  
  <pre><code>PhoneStateListener listener = new PhoneStateListener() { 
          @Override
          public void onDataConnectionStateChanged(int state) {
              super.onDataConnectionStateChanged(state);
              switch (state) {
                  case TelephonyManager.DATA_DISCONNECTED:
                      Toast.makeText(LocationService.this, "Data connection lost!", Toast.LENGTH_LONG).show();
                      break;
                  case TelephonyManager.DATA_CONNECTED:
                      Toast.makeText(LocationService.this, "Data connection available!", Toast.LENGTH_LONG).show();
                      break;
              }
          }
      };
  </code></pre>
  
  <p>The result is always a toast message saying: "Data connection lost!". I'm sure Im missing something simple here but I can't find out what the problem is.</p>