Device functions can be queried through GIPA. There is no device to check for enabled extensions
here, so return anything that is supported.

Test: dEQP-VK.wsi.*
Change-Id: I3be086b4cd0ad6f5e80595aa4401a424780333d2
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/31749
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Chris Forbes <chrisforbes@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>