AttributeError: 'open3d.cpu.pybind.visualization.Visualizer' object has no attribute 'register_key_callback'

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](http://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](http://www.open3d.org/docs/release/) and the [latest documentation](http://www.open3d.org/docs/latest/) (for `master` branch).

### My Question

I'd to display two different point clouds on a single screen using the visualizer's functionality. However, I'm encountering an error as mentioned in the title.

Is it possible to interactively move one of the point cloud datasets using the keyboard?