Restore GrRenderTargetContext as an alias for GrSurfaceDrawContext

Android framework is relying on the old header and old name.

Change-Id: I64065027bb7e96e47bc38b9df973383e236161ab
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/343103
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Stan Iliev <stani@google.com>
Commit-Queue: Stan Iliev <stani@google.com>
1 file changed