[AIDemos] Add missing operators for AIDemos (#36756)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36756
1. Add missing ops for pytorch models used in AIDemos. This is because we're migrating towards the lite-interpreter on mobile, the full JIT version will be deprecated
2. Replace the old mobilenet model with a newer one in bytecode format
3. Regenerate the reddit model to include bytecode
ghstack-source-id: 102422498
Test Plan: `buck build AIDemos:AIDemos`
Reviewed By: iseeyuan, linbinyu
Differential Revision: D21013409
fbshipit-source-id: 7704d32fccfe61a2c9db38846ce3153bb93eee7f
