title: Spinner popup background color issue
body: <p>The following code produces an issue (see attached images) on Asus Intel Zenfone. Every other device I tested on is showing it fine, meaning the black area around the <code>Spinner</code> popup is transparent. </p>
  
  <p>Any way to get rid of black color? I have <code>Theme.AppCompat.Light.NoActionBar</code> applied to the <code>Activity</code>.</p>
  
  <pre><code>&lt;android.support.v7.widget.AppCompatSpinner
      android:id="@+id/spinner"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_marginLeft="16dp"
      android:layout_marginRight="16dp"
      android:popupBackground="@color/light_primary" /&gt;
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/4Eklt.jpg" alt="enter image description here"></p>