* groupCall: add configuration param to allow no audio and no camera

* groupCall: enable datachannel to do no media group calls

* groupCall: changed call no media property as object property

* groupCall: fix existing unit tests

* groupCall: remove not needed flag

* groupCall: rename property to allow no media calls

* groupCall: mute unmute even without device

* groupCall: switch to promise callbacks

* groupCall: switch to try catch

* test: filter dummy code from coverage

* test: extend media mute tests

* groupCall: move permission check to device handler

* mediaHandler: add error in log statement