[tvOS] Fix play/pause button of siri remote

[sy6sy2]

Restore the Siri Remote play/pause button handling in main.

[LePips]

This actually requires a lot more state handling.

1 - Don't make a new state handler, the player state is held in the environment VideoPlayerManager object. The behavior should be the same as the play buttons based on the player state for iOS.
2 - We need to set the state of the overlays. When the play/pause button is pressed, the main overlay should be presented if it isn't and poke the overlay timer.

[jhays]

Suggested change

	@State
	private var isPlaying = true
	@EnvironmentObject
	private var videoPlayerManager: VideoPlayerManager

[jhays]

Probably best to place this @EnvironmentObject above with the other environment objects, its just that I couldn't find a way to use GitHub's suggestion feature on lines that have not been edited in the PR.

[LePips]

Yes, it should go with the other EnvironmentObjects.

[jhays]

Suggested change

	if isPlaying {
	proxy.pause()
	isPlaying = false
	} else {
	proxy.play()
	isPlaying = true
	}
	if !isPresentingOverlay {
	isPresentingOverlay = true
	overlayTimer.start(5)
	}
	switch videoPlayerManager.state {
	case .playing:
	proxy.pause()
	default:
	proxy.play()
	}

[jhays]

@LePips does this solve your change request?

[LePips]

Not just seeing if the overlay is being presented but also set it to the main overlay.

[LePips]

This will be overridden by #1066 with the change to not use the SwiftUI press handlers and use PreferencesView instead.

See why necessary:

• tvOS - Show and interact with the video menu #1066 (comment)