The Image class now contains all the required functions to fill
out the VkSubresourceLayout structure, so this simply hooks the
proper calls to implement vkGetImageSubresourceLayout.

Bug b/119620767

Change-Id: I104811be4a5be31ef5db7ad55965ba263dd110ed
Reviewed-on: https://swiftshader-review.googlesource.com/c/24051Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Chris Forbes <chrisforbes@google.com>