Vulkan: Prefer host cached memory for Buffers This improves perf because vertex data upload uses host visible memory, and uncached memory can be slow. Test: Android on Windows with 1080Ti: glmark2 [build] vbo=false 265 -> 3900 fps Bug: angleproject:5515 Change-Id: Ib75582bbdb4ca4a22d3a121c7b477a23a8a809ef Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2615742 Commit-Queue: Lingfeng Yang <lfy@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>