[NNAPI] Update support for Linear (#54695)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/54695
Previously, torch.nn.Linear was calling aten::addmm internally. Now
it's calling aten::linear, so add support for that.
Test Plan: Unit test
Reviewed By: axitkhurana
Differential Revision: D27536795
Pulled By: dreiss
fbshipit-source-id: 42c8d2a80b20ac12ed9bba599c5e0e874256bb13
