matrix-js-sdk

fcbc195f - Check permission on mute mic, only if no audio track exists. (#3359)

Check permission on mute mic, only if no audio track exists. (#3359) * check permission only if no audio track * fix linter issues * add missing tests for perfect negotiation pattern * add null case in unit tests for audio muting * fix issue with type MediaStream * force right type of mock methode * format code