demos: Add extension support to vulkaninfo
demos: Add extension support to vulkaninfo

Change-Id: I7b9c729a90571d2888d7a22a9899546c547e6153

KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers