title: Toolbar style doesn't work
body: <p>I'm trying to make a light-blue toolbar with white text color:</p>
  
  <pre><code>&lt;android.support.v7.widget.Toolbar
          android:id="@+id/toolbar"
          android:layout_width="match_parent"
          android:layout_height="?attr/actionBarSize"
          style="@style/ToolbarStyle"/&gt;
  </code></pre>
  
  <p>and in my styles.xml:</p>
  
  <pre><code>&lt;style name="ToolbarStyle" parent="ThemeOverlay.AppCompat.Dark.ActionBar"&gt;
      &lt;item name="android:background"&gt;?attr/colorPrimary&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>But there's one problem, the text color is black instead of white</p>
  
  <p><strong>Note:</strong> Using <code>android:theme</code> or <code>app:theme</code> instead of <code>style</code> will fix the problem, but I still wanna know, why doesn't <code>style</code> work?</p>