Move getFillPath from Paint to SkPathUtils.h

It is now named FillPathWithPaint. The behavior should be
unchanged.

The legacy call site is available with the define:
SK_LEGACY_GET_FILL_PATH

Client guards:
 - http://cl/494768310
 - https://crrev.com/c/4097825
 - http://ag/20709885

Change-Id: If7e622b8b6392d0d19eab09ac6184a6f89f2cdb7
Bug: skia:13983
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/616821
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Herb Derby <herb@google.com>
49 files changed