Remove Android-specific code in the Perlin noise code

Bug: skia:14167

Change-Id: I1826d65b00d9cfe861f1388c4b35faecb1761c2e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/654016
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
4 files changed