title: FloatingActionButton setVisibility() not working
body: <p>I can't hide my <code>FloatingActionButton</code>. Here is my code:</p>
  
  <p>XML:</p>
  
  <pre><code>&lt;CoordinatorLayout&gt;
  
      &lt;AppBarLayout android:id="@+id/appbar"&gt;
  
          &lt;CollapsingToolbarLayout&gt;
  
              &lt;ImageView/&gt;
  
              &lt;android.support.v7.widget.Toolbar /&gt;
  
          &lt;/CollapsingToolbarLayout&gt;
  
      &lt;/AppBarLayout&gt;
  
      &lt;NestedScrollView /&gt;
  
      &lt;android.support.design.widget.FloatingActionButton
          android:id="@+id/fab"
          app:layout_anchor="@id/appbar"
          app:layout_anchorGravity="bottom|right|end"/&gt;
  
  &lt;/CoordinatorLayout&gt;
  </code></pre>
  
  <p>And I'm calling:</p>
  
  <pre><code>fab.clearAnimation();
  fab.setVisibility(View.GONE);
  </code></pre>
  
  <p>I'm trying to hide the FAB, but it seems that <code>setVisibility</code> + <code>clearAnimation</code> does not work if the FAB is in a <code>CoordinatorLayout</code>.</p>
  
  <p>Even if I call <code>fab.clearAnimation</code>, the animation is still triggered. Can anyone help me?</p>