Switch SkOffsetImageFilter over to new onFilterImage interface

This CL relies on: https://codereview.chromium.org/1762013002/ (Swap over to using SkImageFilter::filterImage instead of filterImageDeprecated)

TBR=bsalomon@google.com

GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1766743003

Review URL: https://codereview.chromium.org/1766743003
2 files changed