Infer schema for experimental ops (#20513)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20513
They've been using an old API, switch them to the new one instead.
Reviewed By: li-roy
Differential Revision: D15346349
fbshipit-source-id: 538eb460897ec6addebeebf88b316eb0d6b1dd6f
