Mark SkColorFilter::filterColor as deprecated

Bug: b/40040795
Change-Id: Ib5df6462fc164e67048812d863219a752687c952
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/816559
Auto-Submit: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
2 files changed