Revert "Make SkSurface::asyncRescaleAndRead use kStrict constraint"

This reverts commit 451b01fe098faa18f6552ff77e5e1170a0f525c4.

Reason for revert: broke the existing GMs

Original change's description:
> Make SkSurface::asyncRescaleAndRead use kStrict constraint
> 
> Also fix crash if SkSurface has no color space.
> 
> Bug: skia:8962
> Change-Id: I5826ddb10daa46f286d2405b7229ea4f0aefa8f2
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/214306
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>

TBR=bsalomon@google.com,brianosman@google.com

Change-Id: I8e5738492ebd0705c7a3e50a4e7bf9f1d8af578b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:8962
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/214420
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
7 files changed