Merge pull request #6547 from gustavotrott/safari-audio-video-fix

bigbluebutton-html5/client/compatibility/kurento-utils.js

bigbluebutton-html5/client/compatibility/sip.js

bigbluebutton-html5/imports/api/audio/client/bridge/sip.js

...-html5/imports/ui/components/video-provider/component.jsx

...uebutton-html5/imports/ui/services/audio-manager/index.js

...button-html5/imports/utils/ios-webview-audio-polyfills.js

bigbluebutton-html5/imports/utils/safari-webrtc.js