Revert "Fix SkLocalMatrixShader::isAImage() to respect local matrix and image local...

Revert "Fix SkLocalMatrixShader::isAImage() to respect local matrix and image local matrix"

This reverts commit e5efa51b2acc86d1993132348d5b465855a653cc.

Reason for revert: MSAN

Original change's description:
> Fix SkLocalMatrixShader::isAImage() to respect local matrix and image local matrix
>
> Fixes cts tests.
>
> b/37161109
> b/37237678
>
> Bug: skia:
> Change-Id: Ida9ac5e4261e8a6b22e8cdc0e585e0e7929dbbfd
> Reviewed-on: https://skia-review.googlesource.com/13249
> Commit-Queue: Mike Klein <mtklein@chromium.org>
> Reviewed-by: Mike Klein <mtklein@chromium.org>
>

TBR=mtklein@chromium.org,mtklein@google.com,msarett@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I2b78c7b32997344136c784dc77675dafca37565e
Reviewed-on: https://skia-review.googlesource.com/13259
Reviewed-by: Matt Sarett <msarett@google.com>
Commit-Queue: Matt Sarett <msarett@google.com>