Implement `dumpInfo` for .fp files.

Change-Id: I40f6c1a02e194f090e67a0e3f2d7d83cd2317efd
Bug: skia:8434
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/309139
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
71 files changed