Specialize GrBicubicEffet for 1d kernel.

This saves texture reads when we need to scale in x or y but not both
when doing an async rescale and read.

Change-Id: I9e3550585875a1b42db7a2a7bb8bfacf3e840a01
Bug: skia:8962
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/216520
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
6 files changed