LKSampleHandler is only available on iOS, not on visionOS

[PaulAddy]

Is your feature request related to a problem? Please describe. Yes, we are trying to use LiveKit in a visionOS app as we would for a standard basic iOS liveKit implementation. But, the LKSampleHandler is only available on iOS.

Describe the solution you'd like Essentially, as currently possible on iOS, we would like to use a broadcast upload extension with LiveKit on visionOS to broadcast the entire passthrough of the user: main camera + any virtual element including Window, Volume, and Immersive space containers and their contents.

Describe alternatives you've considered Stil considering alternatives, haven't yet found a workaround.

Additional context n/a