Revert of Blacklist GLVertexAttributesBench and GLVec4ScalarBench for GalaxyS4 due...

Revert of Blacklist GLVertexAttributesBench and GLVec4ScalarBench for GalaxyS4 due to skia:4373 (patchset #1 id:1 of https://codereview.chromium.org/1365683003/ )

Reason for revert:
should hopefully be fixed, please reland if not.

Original issue's description:
> Blacklist GLVertexAttributesBench and GLVec4ScalarBench for GalaxyS4 due to skia:4373
>
> BUG=skia:4373
>
> Committed: https://skia.googlesource.com/skia/+/3420d2796bad5ce553efb9909790ea72e578dc47

TBR=borenet@google.com,benjaminwagner@google.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:4373

Review URL: https://codereview.chromium.org/1382933002