title: Visual glitch on activity transition
body: <p>I'm working on an application using ABS.
  And when I use this custom activity animation:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
      &lt;set xmlns:android="http://schemas.android.com/apk/res/android"&gt;
      &lt;translate android:fromYDelta="100%p" android:toYDelta="0" android:duration="1400"/&gt;
  &lt;/set&gt;
  </code></pre>
  
  <p>Either with <em>overridePendingTransition</em> or <em>getWindow().setWindowAnimations()</em></p>
  
  <p>I see a with space on the top on the activity while it's sliding, where the notifications bar would be.</p>
  
  <p>And this glitch doesn't occur on ICS, I don't now if it's related to ABS, but do you have any idea ?</p>
  
  <p>Thanks.</p>