title: Android switching between PreferenceScreens
body: <p>I have a PreferencesScreen, that has some Preferences and a sub-screen. It looks like this:</p>
  
  <pre><code>&lt;PreferenceScreen android:key="root"&gt;
  
      &lt;Preference android:key="first" /&gt;
  
      &lt;PreferenceScreen android:key="subScreen" /&gt;
          &lt;Preference android:key="second" /&gt;
          &lt;Preference android:key="third" /&gt;
      &lt;/PreferenceScreen&gt;
  
  &lt;/PreferenceScreen&gt;
  </code></pre>
  
  <p>When user clicks the subscreen, he is moved to the subscreen view. Now I want to redirect the user to "root" preference screen when he clicks on "second" or "third". I don't seem to find the right API to either close the subscreen, or focus the previous one. Ideas?</p>