SkColorSpacePrimaries: Add operator==

Bug: 40044808
Change-Id: I803579b5d7ad08e35dd70cac1e706c089e980d55
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1142597
Commit-Queue: Christopher Cameron <ccameron@google.com>
Reviewed-by: Christopher Cameron <ccameron@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
4 files changed