Test fails if no `device` parameter.

[prady0t]

With #443 merged, our test suite fails if no device parameter is present in the array library.

array-api-tests/array_api_tests/dtype_helpers.py

Line 206 in 05b12af

x = xp.empty(2, device=device)

array_api_tests/dtype_helpers.py:206: in is_device_dlpack_compatible
    x = xp.empty(2, device=device)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^
E   TypeError: zeros(): incompatible function arguments. The following argument types are supported:
E       1. zeros(shape: int | Sequence[int], dtype: Dtype | None = float32, *, stream: StreamOrDevice = None) -> array
E   
E   Invoked with types: int, kwargs = { device: NoneType }

A simple fix would be to put this line in the try block below.