I get the same results.
The fact that you see the video in the local stream means that the permissions are granted properly.
I think that the remote stream issue is a compatibility issue with WebView. Try to test it with a different WebRTC server.
i need to integrate a jitsi conference with three partecipants (with two works) in my app because i'm working on a kiosk application with "lock task" status and i need to have conference and simultaneosly my app to see other data