Vulkan: Use DrawCallParams in draw methods. This cleans up some of the vertex streaming logic. Bug: angleproject:2389 Change-Id: I8ed2f8acd06bbdd97db40acac35e5692112a3efe Reviewed-on: https://chromium-review.googlesource.com/989257 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>