Occlusion platform support

This package implements the following optional features of AR Foundation's XROcclusionSubsystem:

Feature	Descriptor Property	Supported
Environment Depth Confidence Image	environmentDepthConfidenceImageSupported
Environment Depth Image	environmentDepthImageSupported	Yes
Environment Depth Temporal Smoothing	environmentDepthTemporalSmoothingSupported
Human Segmentation Depth Image	humanSegmentationDepthImageSupported
Human Segmentation Stencil Image	humanSegmentationStencilImageSupported

Graphics API support

To use occlusion in your app, you must build your project with a supported graphics API. The Meta Quest Occlusion feature supports the following graphics APIs:

Build Platform	Vulkan	Direct3D12	Direct3D11	OpenGLES3
Android or Meta Quest	Yes
Windows (Editor or standalone)	Yes	Yes	Yes

To set your project's graphics API for each build target, refer to Configure graphics APIs (Unity Manual).