Suppress skinning benches for NVIDIA_Shield

Also opList-splitting reduction is being enabled everywhere - so remove the explicit flag use

Change-Id: I08f48764bab835a08b072d8d83da3cb4c2bd5ac2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211360
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
9 files changed