Move GlyphAndPos and PathAndPos to interface and rename.

GlyphAndPos -> SkGlyphPos
PathAndPos -> SkPathPos

Change-Id: I64da3bd8327ee60065cacf5d20f7eb6dc75c68aa
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/200511
Commit-Queue: Herb Derby <herb@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
6 files changed