This was claiming depth, integer, etc were all filterable which is
nonsense. Rearrange to just two blocks: filterable, and not.

Bug: b/117974925
Change-Id: I5228454a3f1ac05e9d46e19af4dc98418885fa90
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/29850Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>