title: Show dialog with touch events over lockscreen in Android 2.3
body: <p>I want to build a dialog which is visible on the lockscreen and can receive touch events. I built a window with <code>WindowManager</code> but only the <code>TYPE_SYSTEM_OVERLAY</code> Flag is shown over the lockscreen in GB (Android 2.3.7). </p>
  
  <p>Is there a way to create a system overlay which is visible on the lockscreen and can receive touch events in Android 2.3.7? </p>
  
  <p>There was a bug with <code>FLAG_WATCH_OUTSIDE_TOUCH</code> but I'm not sure how that affects me. Any ideas?</p>