Vulkan: Don't store device handles in wrapped objects. BUG=angleproject:1684 Change-Id: I0ec11ec79f2e9893600a8ffd8cdbfc6040fb6f70 Reviewed-on: https://chromium-review.googlesource.com/426402 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org>