title: Search View close icon not visible when expanded
body: <p>I have a searchView added on a toolBar. Collapsed state looks like this.</p>
  
  <p><img src="https://i.stack.imgur.com/ujRQF.png" alt="Collapsed Search View"></p>
  
  <p>Expanded state looks like this.</p>
  
  <p><img src="https://i.stack.imgur.com/BdfmS.png" alt="enter image description here"></p>
  
  <p>Why is the searchView close icon not displayed?</p>
  
  <p><strong>toolbar.xml</strong> </p>
  
  <p>
  
  <pre><code>android:id="@+id/my_awesome_toolbar"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_alignParentLeft="true"
  android:layout_alignParentTop="true"
  android:background="?attr/colorPrimary"
  android:minHeight="?attr/actionBarSize"
  app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
  app:popupTheme="@style/ThemeOverlay.AppCompat.Dark"&gt;
  </code></pre>
  
  <p></p>
  
  <p><strong>menu.xml</strong></p>
  
  <p></p>
  
  <pre><code>&lt;!-- Search, should appear as action button --&gt;
  &lt;item android:id="@+id/action_search"
      android:icon="@drawable/ic_action_search"
      android:title="@string/action_search"
      app:showAsAction="ifRoom|collapseActionView"
      app:actionViewClass="android.support.v7.widget.SearchView"/&gt;
     &lt;/menu&gt;
  </code></pre>