XRizer flips HMD pose 180 degrees in certain orientations

[SpookySkeletons]

In VRChat upon first world join and all the time in Basis XRizer will flip the HMD pose when looking in certain directions.

Was only able to produce the result one time in VRC.

Basis produces the effect perfectly consistently.

[SpookySkeletons]

OXR_PARALLEL_VIEWS=1 %command% on such games with Monado solves this issue.

Latest revisions of OpenVR Unity plugin are unable to handle canted view info, SteamVR appears to handle this by unconditionally enabling parallel view projections on absolutely everything.

Proposing we default this here to better match SteamVR behavior.