title: Change remoteView ImageView background
body: <p>I have some remoteView with ImageViews, and I need to change the "android:background" programmatically.</p>
  
  <p>I know how to change the "android:src" with:</p>
  
  <pre><code>remoteView.setImageViewResource(int viewId, int srcId);
  </code></pre>
  
  <p>And it works fine, but how do I change the "android:background"?</p>
  
  <p>Thanks</p>