Use VectorXform to determine parametric segments for stroke curves

Change-Id: I088119d01d31d58b154e49479aa071ac68938cb4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/502059
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
7 files changed