com.unity.xr.arcore 2.1.2 Package Notes

Previously, we reported the tracking state of augmented images using an ARCore API that always returned `TrackingState.Tracking`, even when the image had been removed from view. We now use the method ArAugmentedImage\_getTrackingMethod instead, which will change the tracking state to `TrackingState.Limited` if the image cannot be seen.
### Updated
Update depedency on AR Subsystems package to version 2.1.1. This should not impact existing functionality, but helps with future compatibility.

com.unity.xr.arcore 2.1.2