Implement alternate method for determining recycle-ability of allocated GrSurfaces (take 2)

With the upcoming removal of pendingIO refs the GrResourceAllocator needs a new means of determining when a backing GrSurface can be recycled and when it needs to be left assigned to a GrSurfaceProxy.

Change-Id: I2327b0f15ceb639b400a55a9c53359a4b43288c6
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/210041
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
10 files changed