add explicit src and dst colorspaces to filterColor4f

bug: skia:9472

Change-Id: Ibf4a3ab7eddc455a3c51b16bb68678ee722fc752
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/244876
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Reed <reed@google.com>
6 files changed