title: How set duration of the ringtone's play
body: <p>My app play ringtone. My code:</p>
  
  <pre><code>RingtoneManager.getRingtone( context, RingtoneManager.getDefaultUri( RingtoneManager.TYPE_NOTIFICATION)).play();
  </code></pre>
  
  <p>Ringtone play very well. But if ringtone is long I need cut the first N milliseconds from it.</p>
  
  <ol>
  <li>How get full duration of this ringtone?</li>
  <li>How set maximum duration in milliseconds of this ringtone?</li>
  </ol>