[chromecast] Make use of events

[lsiepel]

Main purpose was to change the library to a more maintained version from @Nadahar.
This made it also possible to change from data polling to events, making the binding a bit more snappy with updates.
Improved scheduled task disposal.

[lsiepel]

To the reviewer, the hostname can be used, so i think ipAddress is the wrong name, but it is also breaking, so i have some doubts to change it or not. I can also update the docs, that ipAddress can also contain a hostname, but meh.

[Nadahar]

Couldn't it at least be explained in the parameter description? That wouldn't break anything.

[Nadahar]

Suggested change

	List<MediaStatus> statuses = event.getData(MediaStatusResponse.class).getStatuses();
	if (statuses != null && statuses.size() > 1) {
	logger.warn("Received multiple media statuses, this is not supported. Statuses: {}", statuses);
	} else if (statuses != null && !statuses.isEmpty()) {
	statusUpdater.updateMediaStatus(statuses.getFirst());
	} else {
	statusUpdater.updateMediaStatus(null);
	}
	MediaStatusResponse mediaStatusResponse = event.getData(MediaStatusResponse.class);
	List<MediaStatus> mediaStatuses = mediaStatusResponse == null ? null : mediaStatusResponse.getStatuses();
	if (mediaStatuses == null) {
	statusUpdater.updateMediaStatus(null);
	} else {
	for (MediaStatus mediaStatus : mediaStatuses) {
	statusUpdater.updateMediaStatus(mediaStatus);
	}
	}

[Nadahar]

There will be multiple statuses at times. There's no point in "rejecting" that, just apply them in order..?

[Nadahar]

As far as I remember, certain "actions" involve transitions that produce more than one media status in sequence.

[Nadahar]

Suggested change

	statusUpdater.processStatusUpdate(event.getData(ReceiverStatusResponse.class).getStatus());
	ReceiverStatusResponse receiverStatusResponse = event.getData(ReceiverStatusResponse.class);
	statusUpdater.processStatusUpdate(receiverStatusResponse == null ? null : receiverStatusResponse.getStatus());

[Nadahar]

Despite what Eclipse's nullness logic claims, getData() very much can return null.