SkColorInfo: It's SkImageInfo minus the dimensions.

Change-Id: Idea9530028428c1a9d42e08a655457938b284b84
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/245261
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
9 files changed