Add SqueezeNet to PyTorch Playground
Summary: Add support for SqueezeNet in the PyTorch Playground test app
Test Plan:
```
arc focus2 pp-ios
```
Reviewed By: xta0
Differential Revision: D26083960
fbshipit-source-id: a0d753eefa431f2f9e377f082c564370d6774c0b
