title: Disable hamburger to arrow animation
body: <p>I am trying to implement a two-drawer layout with the android v7 support library. I have a navigation drawer on the left (Gravity.START) side and a notification drawer on the right (Gravity.END) side. The problem is that I need the hamburger in the action bar to stay a hamburger when the notification drawer is pulled out, but stay animated and change to an arrow if the navigation drawer is pulled out. Currently it changes to an arrow when either one is pulled out. I have successfully disabled the animation by overriding <code>onDrawerSlide(View, float)</code> and only calling to <code>super.onDrawerSlide(View, float)</code> if the View is the navigation drawer and doing nothing if the View is the notification drawer like this:</p>
  
  <pre><code>@Override
  public void onDrawerSlide(View drawerView, float slideOffset) {
      // Make sure it was the navigation drawer
      if(drawerView.equals(navigationDrawer)) {
          super.onDrawerSlide(drawerView, slideOffset);
      }
      else {
          // Do nothing
      }
  }
  </code></pre>
  
  <p>However, once the notification drawer has fully opened, the icon still changes to an arrow. Any idea how to disable this change?</p>