title: isIdleTimerDisabled not working for Video call iOS app
body: <p>I have a WebRTC iOS video call app and i need to set <code>isIdleTimerDisabled</code> to <code>true</code> when video call is started, so the device will not dim the display and not go to sleep after a while.</p>
  
  <p>I saw that Viber does not dim the display nor it goes to sleep during a video call, but my app goes to sleep 20 seconds after a video call is established. I have made sure that i call</p>
  
  <pre><code>UIApplication.shared.isIdleTimerDisabled = false
  </code></pre>
  
  <p>when video call is ended, and</p>
  
  <pre><code>UIApplication.shared.isIdleTimerDisabled = true
  </code></pre>
  
  <p>when video call is established.</p>
  
  <p>Is there something else I must do to prevent idle timer while in video call, something like in App capabilities?</p>