Add SkImage::reinterpretColorSpace

This reinterprets the contents of an image as though they were in a
different color space. Helpful for tools and debug visualization.

Bug: chromium:795132 chromium:985500
Change-Id: Ia8739bbd73d72249b8bee9d51dfa11d560a2a1f5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/234328
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
13 files changed