Implemented parsing of lut8/lut16Type A2B ICC tags

SkColorSpace::NewICC() can now successfully parse lut8Type/lut16Type
A2B0 tags instead of just A2B0Type ones. It will store the resulting
information in a SkColorSpace_A2B which allows color-correct decoding
of some images which previously were not supported.

BUG=138556
BUG=574209

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4770

Change-Id: I83b565af3f39f12a4bc37e0e7968f7d41e553291
Reviewed-on: https://skia-review.googlesource.com/4770
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Robert Aftias <raftias@google.com>
1 file changed