Add filelists to stage encoding changes

This should let me stage the changes in https://skia-review.googlesource.com/c/skia/+/667298
before landing.

The public.bzl change is for G3, the rest is for Chromium.

Change-Id: I19d85f4027e8904ba87389798e3b5d17e106b27b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/669116
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
7 files changed