layers: swapchain queue family count tracking
layers: swapchain queue family count tracking

Add vkGetPhysicalDeviceQueueFamilyProperties2KHR as an alternate way get
queue family count.

Change-Id: Ie0efee916a1bf091eb34c8610eec3c73943db846

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools