Reland "strip down SkICC.cpp"

This reverts commit 27fe397bc0cc1b091f9f85863c62b88156239cf0.

Reason for revert: time to fly.

Original change's description:
> Revert "strip down SkICC.cpp"
> 
> This reverts commit eab50eb9c6117c2a9d0e5648f89cebbb4dbd9d30
> and this tiny bit of e61b969a07ba3ebe9e47e61381ad16c5d2c549a2:
> 
>     https://skia-review.googlesource.com/c/skia/+/127122/3/tests/ICCTest.cpp
> 
> Change-Id: I4306e5118a4e5eb88c05078186a28bd443fd76f7
> Reviewed-on: https://skia-review.googlesource.com/127305
> Reviewed-by: Mike Klein <mtklein@chromium.org>
> Commit-Queue: Mike Klein <mtklein@chromium.org>

TBR=mtklein@chromium.org,brianosman@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I93a6cfb66f0da0e098fdcb77ac1cd619e41614b1
Reviewed-on: https://skia-review.googlesource.com/129446
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
5 files changed