Stub encoding impls for clients without libraries

Bug: skia:
Change-Id: I447b071e50182a569af828dc7f62bf78f47f834d
Reviewed-on: https://skia-review.googlesource.com/15644
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>
1 file changed