title: onPause difference between screen lock and incoming call
body: <p>I'm developing an audio application. It plays sounds in the background and I want it to turn off when an incoming call happens but not when the screen locks.
  My first chance was to call player.stop() on onPause as I thought it will do the trick when incoming or other applications will run on top. 
  But I found that screen lock calls also this onPause event.</p>
  
  <p>Is there any chance to get the cause of that calling?</p>