Handle time wrap around in inspector (#3766)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/3766

In platforms which represent time using 32 bits there might be a wrap around and we handle that now in inspector.py. Ideally we should source this max value from the platform using etdump, but for now it should be fine to assume 32 bits if there's a wrap around.

Reviewed By: abhiag-git, Jack-Khuu, Olivia-liu

Differential Revision: D57925542

fbshipit-source-id: 69886ca1f09074d1b16f125540a41d780d6c2972