Fix: incorrectly named parameters

[juteman]

Change two function parameter name to deviceIdkey.

DesktopCaptureSource DesktopCaptureSourceForKey(
	const std::string &uniqueKey);
bool ShouldBeDesktopCapture(const std::string &uniqueKey);

These function parameters has named "uniqueKey".

But in context of VideoCapturerInterfaceImpl, we get

VideoCapturerInterfaceImpl::VideoCapturerInterfaceImpl(
	rtc::scoped_refptr<webrtc::VideoTrackSourceInterface> source,
	std::string deviceId,
	std::function<void(VideoState)> stateUpdated,
	std::shared_ptr<PlatformContext> platformContext,
	std::pair<int, int> &outResolution)
: _source(source)
, _sink(GetSink(source))
, _stateUpdated(stateUpdated) {

	if (const auto source = DesktopCaptureSourceForKey(deviceId)) {
		const auto data = DesktopCaptureSourceData{
			/*.aspectSize = */{ 1280, 720 },
			/*.fps = */24.,
			/*.captureMouse = */(deviceId != "desktop_capturer_pipewire"),
		};
		_desktopCapturer = std::make_unique<DesktopCaptureSourceHelper>(
			source,
			data);
		_desktopCapturer->setOutput(_sink);
		_desktopCapturer->start();
		outResolution = { 1280, 960 };
	} else if (!ShouldBeDesktopCapture(deviceId))
	{
		_cameraCapturer = std::make_unique<VideoCameraCapturer>(_sink);
		_cameraCapturer->setDeviceId(deviceId);
		_cameraCapturer->setState(VideoState::Active);
		outResolution = _cameraCapturer->resolution();
	}
}

We pass "device id" to DesktopCaptureSourceForKey(). So this naming is very confusing.