title: Add MenuItem to NavigationView with Icon and Title?
body: <p>Right now I am trying to implement the DrawerLayout/NavigationView from the new Design Support libary (22.2.1) into my application. I already searched on the internet and especially on stackoverflow how to add a MenuItem to a Submenu with Icon and Title. I know that it is possible to add a menuitem with a title <strong>or</strong> icon.</p>
  
  <p>like that: </p>
  
  <pre><code>        Menu m = mNavigationView.getMenu();
          m.add(R.id.groupID,R.id.menuItemID,orderNumber,"title");
  </code></pre>
  
  <p>But that is only a MenuItem with a Title,without Icon.
  Is it possible to add a MenuItem with a Title <strong>and</strong> Icon?</p>