title: Collapsible List Item in navigation Drawer
body: <p>I have read the documentation of android Navigation Drawer but there is nothing on how to create collapsible/expandable List item in navigation drawer. I know something about android <code>ExpandableListView</code> but I think it is not the way to create it. 
  I want to create such nested item:</p>
  
  <p><img src="https://i.stack.imgur.com/vilHb.png" alt="enter image description here"></p>