com.unity.xr.arkit 3.1.7 Package Notes

The ARKit Settings has been moved from Project Settings > XR to Project Settings > XR Plug-in Management for consistency with other XR platforms. See ARKitSettings for more information. ARKit build settings will no longer have to be created manually, installing the package will automatically create ARKit settings.

Fixed an issue where ARKit shaders could incorrectly remain in the Preloaded Assets array, which could interfere with builds on other platforms. For example, in some cases, if first you built for iOS, and then built for Android, you might have seen an error message like
```
Shader error in 'Unlit/ARKitBackground': failed to open source file: 'Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl' at line 44 (on gles3)
```
Updated the CBUFFER name containing the UnityDisplayTransform matrix from AR Foundation to avoid collision.

com.unity.xr.arkit 3.1.7