Summary:
There are a couple times in the code where Device, make_device and get_device are imported by:
`from ..common.types import Device, get_device, make_device`
which will not work without this init file, at least on python 3.8.
Pull Request resolved: https://github.com/facebookresearch/pytorch3d/pull/706
Reviewed By: bottler
Differential Revision: D29031835
Pulled By: patricklabatut
fbshipit-source-id: 15743e3c8cffdfcca51b6d2f377b923da9cbe6f9
Summary: Introduce device type and utility functions in common types module
Reviewed By: nikhilaravi
Differential Revision: D28970930
fbshipit-source-id: 191ec07390ed66a958c23eb2b43229312492e0b7
