Mobile module forward() pass input by value. (#30060)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/30060
Mobile forward() passed inputs by reference, which is different from JIT's script::module. To make it consistent, change it pass by value.
Test Plan: Imported from OSS
Differential Revision: D18587786
Pulled By: iseeyuan
fbshipit-source-id: fa398124fd0a5168f708733ff88f0ba327726f43
