Added VkPipelineShaderStageRequiredSubgroupSizeCreateInfo
Added VkAttachmentReferenceStencilLayout
Added more nullptr checks for pNext
#rb Allan.Bentham
[CL 25551558 by carl lloyd in ue5-main branch]
Fixes potential issues with vulkan PSO LRU.
silence some direct to logcat spam from the vulkan PSO compiler service
Add simple verification code to compare PSOs from android services vs engine.
#rb carl.lloyd
[CL 21997860 by allan bentham in ue5-main branch]