Don't expose hasCall in lobby mode for non-moderators
Don't expose hasCall in lobby mode for non-moderators

This will hide the icon in the UI for non-moderators
when a call is in progress between moderators in lobby mode.

Signed-off-by: Vincent Petry <87e1f221a672a14a323e57bb65eaea19d3ed3804@nextcloud.com>

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed