Remove most of the remaining conflation of colorSpace and sRGB in Ganesh

Change-Id: I22cd838f15c548b459da925cd7e7d228f95fb2e2
Reviewed-on: https://skia-review.googlesource.com/131583
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
13 files changed