hide getters so we can change the internals of SkVertices

Bug: skia:9984
Change-Id: Id8d8d568fb29b006d19079248c579282207279c1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/275692
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
10 files changed