Added function InitVulkanFeatures - better code for enabling Vulkan device features.
Added function InitVulkanFeatures - better code for enabling Vulkan device features.

GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator,GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator,GPUOpen-LibrariesAndSDKs/VulkanMemoryAllocator