Moved Settings handling into SkSLFieldAccess

This lets the magic behavior of accessing a field of sk_Caps work from
DSL.

Change-Id: I7d21842023ee74b0d9ca8da44622a11e3a8319c8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/417682
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed