Revert "convert sample completely to SkM4"

This reverts commit e455d2e708c2bb5ab12994c291d9830bedda0a04.

Reason for revert: more testing

Original change's description:
> convert sample completely to SkM4
> 
> Change-Id: Ib8fdf0f9c326f0809d132da650eaccc20e58f9f8
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/266676
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Reed <reed@google.com>

TBR=reed@google.com

Change-Id: I946dbeb166b00a53aa7b3f470322c46d6263e9a7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/266678
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
3 files changed