[quant][ns] Fix ns tool bug for mobilenetv2/v3 (#74149)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/74149
mobilenet v2/v3 failed when using ns tool to analysis the model
due to the empty the tensor, fixed it by filtering the empty tensor
Test Plan: Imported from OSS
Reviewed By: vkuzo
Differential Revision: D34851886
fbshipit-source-id: db94fd5cef7d4a7a128d46bfe3f5ff4e532845fe
(cherry picked from commit 4616a75105abf187a178d95165249cd33345515d)
