Vulkan: Update cube map array support check. Bug: angleproject:5143 Change-Id: I0b774096ae762ae088a27ef1b4d52bf446562736 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3021283 Reviewed-by: Nicolas Capens <nicolascapens@google.com> Commit-Queue: Jamie Madill <jmadill@chromium.org>