title: what is result code or data returned by give intent
body: <p>I am installing a package using intent.
  I can install it alright, but this is what i want to do.</p>
  
  <p>I would call install intent like</p>
  
  <pre><code>startActivityForResult(installIntent,requestCode);
  </code></pre>
  
  <p>now i want to check in OnActivityResult, whether the app i wanted to install was actually installed or not? 
  So does installer return any result code or extra data indicating this?</p>