title: Robolectric compilation error while using shadowOf method
body: <p>I am using Robolectric 1.2 in an Andorid 2.3.3 project (API 10)<br>
  It throws the below compilation error, when using shadowOf method</p>
  
  <pre><code>ShadowView shadowView = Robolectric.shadowOf(view);
  </code></pre>
  
  <p>error: cannot access ObjectAnimator</p>
  
  <p>But the error is gone, if I change the android sdk to API 11 and above</p>