Make GrColorSpaceInfo store GrColorType.

This is largely redundant with GrPixelConfig. However, we intend to
remove GrPixelConfig.

Bug: skia:7580

Change-Id: I03d92303be832711f7821f8a97d36387c9b04a9f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/222883
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
95 files changed