Set to true to set device into a in-call state.
If set to false, the subsequent argument for ISingleInitialState.muted will be ignored (setting mute state on an idle device is not supported).
Optionalmutedtrue to mute the device and false to unmute.
Can only be set to true if ISingleInitialState.callActive is also set to true.
Optional initial state for ISingleCallControl.
Used to set the initial state if the device was changed in the middle of a call, or to recover the state after device disconnections.