Merge "Add gpu implementation of SkAvoidXfermode GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1658623002" into master-skia

https://skia.googlesource.com/skia/+/15691a055db9b68c9b48f589e48d8a85888cf83f

Change-Id: I2f016d407885e82bc31c80ff8245ec116a44de80