So I see `PINCH` registered here, but on Android there is no zooming while pinching.  Interestingly, you can still tilt with two fingers (registered below on line 199).  You can also orbit around a spot on the surface with two fingers (I think this used to be called "rotate" but now is just part of the tilt handler maybe?).

In other words, these other actions are both correct, only the actual pinch-zoom itself is missing.