Add verb measurement utils to SkContourMeasure

Change-Id: Ia0c5bfeecb462d079179516bc050004ceb8679ea
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/913916
Commit-Queue: Florin Malita <fmalita@google.com>
Reviewed-by: Daniel Dilan <danieldilan@google.com>
3 files changed