Enable fp16 for UniformFill (#44540)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/44540
Support output type to be fp16 for UniformFill
Reviewed By: jianyuh
Differential Revision: D23558030
fbshipit-source-id: 53a5b2c92cfe78cd11f55e6ee498e1bd682fe4a1
