Remove all internal uses of (and deprecate) SkSurface::getContext

We are replacing GrContext with the GrDirectContext/GrRecordingContext
pair. This starts making that change visible to clients (and weaning
Skia off of GrContext).

Change-Id: I00cc9bf208499984de855a1646229bd7557fc925
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/300706
Reviewed-by: Adlai Holler <adlai@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
13 files changed