title: Toolbar menu icon is not centered vertically
body: <p><a href="https://i.stack.imgur.com/ILWKI.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ILWKI.png" alt="screenshot of the application"></a></p>
  
  <p>I've turned on the "Show layout boundaries" option in Developer Options. From the image I've posted it's obvious that the 'search' icon is not centered vertically.</p>
  
  <p>Code for toolbar and to its style:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;android.support.design.widget.CoordinatorLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"&gt;
  
  
  &lt;android.support.v7.widget.Toolbar
      android:id="@+id/toolbar"
      style="@style/AppBar"
      android:layout_width="match_parent"
      android:layout_height="?attr/actionBarSize"
      android:gravity="center_vertical"
      android:background="@color/colorPrimary"
      android:minHeight="?attr/actionBarSize"
      android:theme="@style/AppBar"/&gt;
  
  &lt;include layout="@layout/content_main"/
  &lt;/android.support.design.widget.CoordinatorLayout&gt;
  </code></pre>
  
  <p>AppBar style:</p>
  
  <pre><code>&lt;style name="AppBar" parent="ThemeOverlay.AppCompat.Dark.ActionBar"&gt;
      &lt;item name="android:windowActionBarOverlay"&gt;true&lt;/item&gt;
      &lt;item name="android:windowActionModeOverlay"&gt;true&lt;/item&gt;
      &lt;item name="colorAccent"&gt;@color/white&lt;/item&gt;
      &lt;item name="drawerArrowStyle"&gt;@style/DrawerArrowStyle&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>The menu is inflated in mainActivity:</p>
  
  <pre><code>@Override
  public boolean onCreateOptionsMenu(Menu menu) {
      if (mMenu == null) {
          mMenu = menu;
          inflateSMenu();
      }
      return true;
  }
  
  public void inflateSMenu() {
      mMenu.clear();
      setToolbarTitle(getString(R.string.title));
      getMenuInflater().inflate(R.menu.menu_cat, mMenu);
  }
  </code></pre>
  
  <p>menu_cat.xml</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;menu xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"&gt;
  
    &lt;item
        android:id="@+id/action_add_category"
        android:icon="@drawable/ic_search_white_24dp"
        android:title="@string/search"
        app:showAsAction="always"/&gt;
  &lt;/menu&gt;
  </code></pre>
  
  <p>My quesion is: How can I center the menu icon vertically?</p>