Throw an exception when method cannot be found from mobile module. (#33972)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/33972
Test Plan: Imported from OSS
Differential Revision: D20168965
Pulled By: iseeyuan
fbshipit-source-id: 2efe5dcb1fb80407cd88a47c50cb382ecd8aa275
