Merge "Make copySurface work for texture dsts, return a bool, & add unit test. GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1684313002" into master-skia

https://skia.googlesource.com/skia/+/7ea5e28065e5eb797e95f5d81c1a65cf3209d741

Change-Id: Ica62ab1846139efde1f65d661a811bd9b882d0d0