Add SkColorTable to share memory for SkColorFilters::Table

Bug: skia:1434335
Change-Id: I46545657021e4c0817172750ebc55a2dd67e204f
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/707481
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
10 files changed