title: getNeighboringCellInfo() returning null
body: <p>I'm  most of code used a little trying to get neighbor cells info (for the current cell info, everything works fine)</p>
  
  <pre><code> List&lt;NeighboringCellInfo&gt; neighborCells = telMgr.getNeighboringCellInfo();
   if (neighborCells == null) {
       Log.d("cells", "Neighbor cells is null");
   } else {
       for (NeighboringCellInfo cell : neighborCells) {
           Log.d("cells", cell.getCid()+"-"+cell.getLac()+" "+(-113+cell.getRssi()*2)+"dB");
  
           String neighboringcell= cell.getCid()+"-"+cell.getLac()+" "+(-113+cell.getRssi()*2)+"dB";
  
           Toast.makeText(getApplicationContext(), neighboringcell, Toast.LENGTH_LONG).show();
           mNeighboringcell.setText(neighboringcell);
       }
   }
  </code></pre>
  
  <p>i have used this code  and give this permission </p>
  
  <pre><code>&lt;uses-permission android:name="android.permission.INTERNET" /&gt;
  &lt;uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /&gt;
  &lt;uses-permission android:name="android.permission.ACCESS_COARSE_UPDATES" /&gt;
  &lt;uses-permission android:name="android.permission.READ_PHONE_STATE" /&gt;
  </code></pre>
  
  <p>and i am tested Samsung 4.0  and lava 4.1</p>
  
  <p>Please give me solution</p>
  
  <p>Thanks</p>