title: Listener for enable/disable mobile data (not connected or disconnnected)
body: <p>I test some actions (see below). </p>
  
  <pre><code>ConnectivityManager.CONNECTIVITY_ACTION
  WifiManager.NETWORK_STATE_CHANGED_ACTION
  PhoneStateListener.LISTEN_DATA_CONNECTION_STATE (it is not actually action)
  PhoneStateListener.LISTEN_DATA_CONNECTION_STATE (it is not actually action)
  </code></pre>
  
  <p>But they listen only state (connected or disconnected). </p>
  
  <p>When wifi disconnected, It can listen (enable mobile data -> connnected -> broadcast - > listener)</p>
  
  <p><strong>When wifi copnnnected, It cannot listen</strong> (enable mobile data -> connetivity does not changed!)</p>
  
  <p>I need wheather mobile data settings is enable or not</p>
  
  <p>Can I listen mobile data enabled or disabled event?</p>