title: Detect if notification has been deleted
body: <p>I have the following problem. I want to detect when a notification has been removed from the notification bar.</p>
  
  <p>I can scan notifications with an AccessbilityService and casting its ParcelableData to a notification </p>
  
  <pre><code>Notification notif = (Notification) event.getParcelableData();
  </code></pre>
  
  <p>One thought of mine was, utilizing if the PendingIntent of the notification has been clicked, but I can't find anything on how to detect that.</p>
  
  <p>Any ideas? I am kind of desperate... trying it for hours now.</p>