Make virtual objects react and blend more to the real environment

[xBambusekD]

It could be beneficial, if virtual objects (AO, AP) would react to the real physical environment - bump into table, collide with boxes, testers, etc. Three main sub-enhancements could be considered:

1. Collide with the real environment - snapping of virtual objects to e.g. table (with the ability to pass through if needed) - probably won't be precise and will be limited to the capabilities of ARCore
2. Collide with another virtual objects - bumping and snapping of virtual objects to another virtual objects
3. Visualize occlusions - when a virtual object is occluded by some real one, render it differently to distinquish that the object is not visible - with the use of ARCore's DepthAPI, we could render the occluded virtual content at least approximately