title: How to list all activities exposed by an application?
body: <p>I think that it should be possible to get all the activities from 'third-party' application, described in the manifest file.
  I can't figure out how.</p>
  
  <p>for example:</p>
  
  <pre><code>List&lt;Activity&gt; aList = packManager.getActivitiesForPackage("package.name");
  </code></pre>
  
  <p>thanks in advance!</p>