[minor] SkGlyphRunList public before private

Change-Id: I7e82ff246ebab3e28c7400f5e09a0213dfffdbb0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/248998
Auto-Submit: Hal Canary <halcanary@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
2 files changed