Make SkGpuDevice hold a GrRecordingContext

This makes the code reflect what is actually going on. During DDL
recording the SkGpuDevice only holds a recording context.

This can't land until the following Chrome-side CL lands:

https://chromium-review.googlesource.com/c/chromium/src/+/2277964 (Add GrContext.h include to skia renderer for upcoming Skia roll)

Change-Id: I69cfa744226c315c25f68fc509b7b59ec38bbf31
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/299867
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Adlai Holler <adlai@google.com>
23 files changed