[Functionalization] test_basic_advanced_combined_xla

[Wonjoo Lee]

Running python test/test_torch.py TestTensorDeviceOpsXLA.test_basic_advanced_combined_xla fails with

RuntimeError: sym_strides() called on an undefined Tensor

[Jiewen Tan]

Is this fixed already?

[Wonjoo Lee]

This is fixed with the null tensor check and is now enabled in the POC PR.