Add V2 SFC and SDC stubs

Bug: skia:11837
Change-Id: Id7aa117af3e026d71caeed3ee6489394e869eed1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/436568
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
6 files changed