ObserveConferenceCallingEnabledUseCase
interface ObserveConferenceCallingEnabledUseCase
Returns Unit only when our conference calling setting changes from false to true, meaning our conference calling capability has been enabled. Internally we rely on getting event Event.FeatureConfig.ConferenceCallingUpdated. This can be used to inform user about the change, for example displaying a dialog about upgrading to enterprise edition.