Make SkImages::RasterFromBitmapNoCopy available for non-Framework builds

This also cleans up a minor annoyance where ganesh code was lurking
in src/image - I've moved Android-framework Ganesh helper code to
src/gpu/ganesh/image and kept the not-Ganesh helper in src/image.

This should resolve the issues I was seeing on http://ag/37762228
by building SkImages::RasterFromBitmapNoCopy on the default build.

This is a follow-up to https://review.skia.org/1136337

Change-Id: I261899816a27c5e93d714455a98f4c4403fe26a2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/1138098
Reviewed-by: Nicolette Prevost <nicolettep@google.com>
Commit-Queue: Kaylee Lubick <kjlubick@google.com>
Auto-Submit: Kaylee Lubick <kjlubick@google.com>