Update SK_IMAGE_VERSION to 3

This includes two new test wbmps (that came from clients of BitmapFactory).

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1722263002

Review URL: https://codereview.chromium.org/1722263002
1 file changed