Move GrProxyProvider down to GrRecordingContext

Bug: skia:10286
Change-Id: I474cb0e4cbde3b576604e80891912104990b786c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/372118
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Auto-Submit: Adlai Holler <adlai@google.com>
8 files changed