retry explore always using SkRasterPipeline for color space transforms

Testing notes:
  $ out/dm --src colorImage --colorImages skimage/colorspace --config srgb 8888 f16
  All images identical on Trashcan.

  Had to revert before because of crashes on iOS, and image diffs
  (32-bit ARM?).

Change-Id: Ic182c0f98b1a846a351499aa53293186bb55f2ad
Original: https://skia-review.googlesource.com/c/19744/
Reviewed-on: https://skia-review.googlesource.com/20680
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
1 file changed