Check how internal clients are handled

> Besides not showing the participant in the view you might need to do [an additional change to avoid opening data channels](https://github.com/nextcloud/spreed/commit/f230e3c9c51a390e817b57bcb3874d72318f9add) (full description of the issue in the related pull request, it may not affect Talk iOS).

_Originally posted by @danxuliu in https://github.com/nextcloud/talk-ios/issues/1094#issuecomment-1444016888_