Allow creating SkSurfaceCharacterizations directly for vk secondary CB context.

Bug: chromium:1144921
Change-Id: I9ca905eb9f2542aafbde25e0baa5430640277699
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/331877
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
5 files changed