[SkImage] Add == and < operators to SkImage::RequiredProperties.

Useful for clients.

Change-Id: Ied0109a00b4605f0d9b4337a8c24ec5d5f9ac211
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/751536
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
Auto-Submit: Colin Blundell <blundell@chromium.org>
1 file changed