Propagate static_if more completely. (#35834)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/35834
This handles the cases we did not handle before in AND and OR statements:
static_true || <unknown> -> static_true
static_false && <unknown> -> static_false
Test Plan: Imported from OSS
Differential Revision: D20801125
Pulled By: zdevito
fbshipit-source-id: 0ef94c3a14c7af91580fc5248a4ccfd9e8d6d481
