Fix save-images to start image in layout unknown
Fix save-images to start image in layout unknown

Also allow present format used by mesa driver

Change-Id: I684b8a49b39bd7b00728e7d9bc9eb272638ec7bf

Radamanthe/VulkanSamples,Radamanthe/VulkanSamples,Radamanthe/VulkanSamples,Radamanthe/VulkanSamples,Radamanthe/VulkanSamples,Radamanthe/VulkanSamples