Moved scanInterfaceBlock into DSLCore

Change-Id: I984477cad7885ef941fbc6d2dc7f48fc617a740c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/459118
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
3 files changed