title: React Native support PiP (Picture-in-Picture) mode for video calling app
body: <p>I need to add PiP(Picture in Picture) mode to a react native app (both Android and iOS).
  Some video calling apps such as Google Meet, etc are already support PiP mode, and I want to make the app like this. I'm using <code>react-native-webrtc</code> library for video calling feature and app works fine in foreground mode, but don't know how to add PiP mode to the app for both iOS and Android.</p>
  <p>Thanks!</p>