implement most SkImageEncoderFns with skcms

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I8c0e47933538034a2ea6f77f86b4d2694014e6b3
Reviewed-on: https://skia-review.googlesource.com/c/167686
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
3 files changed