Change intermediate image sizes in GrSurfaceContext::rescale

Change-Id: Ia4a044b458a3cda6beb5edca76f30d7289262385
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/291362
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2 files changed