Update Oculus Interface to be able to consume the newer Oculus XR Package

[SimonDarksideJ]

XRTK - Mixed Reality Toolkit Feature Request

Is your feature request related to a problem? Please describe

Update Oculus Interface to be able to consume the newer Oculus XR Package, the older OVRPlugin is being deprecated from 2019 onwards.

How would you classify your suggestion

• New platform support

Additional context

https://developer.oculus.com/blog/oculus-all-in-on-openxr-deprecates-proprietary-apis/

[StephenHodgson]

I would like to look into possibility of not creating such a hard dependency on the XR sdk.

[SimonDarksideJ]

As Oculus are removing their own packages and just writing a OpenXR implementation, that would be quite difficult, you'd have to write and maintain your own OpenXR interpreter for each platform to avoid it.

[StephenHodgson]

You're right, We do need our own OpenXR implementation.