Hide legacy drawImage methods

Migrate clients to use drawImage(... sampling)
rather than relying on paint's filter-quality.

This CL just gets started, introducing the build-flag.

Bug: skia:7650
Change-Id: I4afdd964c6f805058afee0a8f3a6887d501ad42b
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/356076
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
9 files changed