title: DrawerLayout setDrawerShadow and setDrawerElevation both not working (support 23.0.1)
body: <p>I'm trying to set a shadow on my navigation drawer after updating the support library but for some reason nothing is working and I'm stumped. </p>
  
  <p>I came across this issue but it's solution is to just use setElevation which is also not working for me: <a href="https://code.google.com/p/android/issues/detail?id=184434" rel="nofollow">https://code.google.com/p/android/issues/detail?id=184434</a></p>
  
  <p>There really isn't much code to post but here's what I'm talking about for reference:</p>
  
  <pre><code>int currentapiVersion = android.os.Build.VERSION.SDK_INT;
  
  if (currentapiVersion &gt;= android.os.Build.VERSION_CODES.LOLLIPOP) {
      mDrawerLayout.setDrawerElevation(25f);
  } else {
      mDrawerLayout.setDrawerShadow(R.drawable.left_drawer_shadow, GravityCompat.START);
  }
  </code></pre>
  
  <p>I'm using a ScrimInsetsFrameLayout but that shouldn't be causing the issue AFAIKT.</p>
  
  <p>Any ideas?</p>