title: Adding a terminate playback button using Android L Notification.MediaStyle
body: <p>I want to create a Media Playback notification using the new Android L MediaStyle template. Now, I succeeded doing so perfectly well for actions like previous, play, pause, next (by using <code>addAction()</code>, but I couldn't find a way to add a "close" button like in the <a href="http://developer.android.com/design/patterns/notifications.html" rel="noreferrer">Android Notifications Documentation</a> screenshot:</p>
  
  <p><img src="https://i.stack.imgur.com/a7XDm.png" alt="enter image description here"></p>
  
  <p>Is there a neat way to achieve this? I want the "close" button to terminate the currently playing playback, clear the playback notification, and be located as in the attached screenshot.</p>