Add enabling default instructions flag for mobile (#57778)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/57778
Test Plan: Imported from OSS
Reviewed By: iseeyuan
Differential Revision: D28268997
Pulled By: tugsbayasgalan
fbshipit-source-id: 5571b233d03d3aa80c820ee4245b4d0d3b70f924
