nnapi: Add int32 type torchscript expressions (#70197)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/70197
Test Plan:
* `pytest test/test_nnapi.py`
* Testing via ops following this commit
Reviewed By: anshuljain1, dreiss
Differential Revision: D33237917
fbshipit-source-id: f0493620f28a62ad9fe0b97b67d1e25059d50c24
