Vulkan:Refactor SecondaryCommandBuffers A bunch of changes to rework and improve SecondaryCommandBuffers. Inlined all of the command functions and moved them into the header. Created new specialized commands for updating Compute/Graphics DescriptorSets and setting a memoryBarrier. Updated all of the pointer storage to be inferred rather than explicitly stored in order to save space. Also removed various params that are fixed in ANGLE to save space. Bug: angleproject:3136 Change-Id: I994bb70d5e4db6d9e71d38ac62451aaec780a5e1 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1535704 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Tobin Ehlis <tobine@google.com>