Fix the crashes for c++ not able to find java class through Jni (#30390)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/30390
Fix the crashes for c++ not able to find java class through Jni
ghstack-source-id: 94499644
Test Plan: buck install -r fb4a
Reviewed By: ljk53
Differential Revision: D18667992
fbshipit-source-id: aa1b19c6dae39d46440f4a3e691054f7f8b1d42e
