[skottie] Fractal Noise optimization
[skottie] Fractal Noise optimization

Hoist all evolution-related calculations out of the shader, and pass
precomputed noise planes and weight uniforms.

Renders ~20% faster locally (w/ software rasterization).

Change-Id: I771bea8f3425440515d2cb9a8623336d18bcc7b1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/460336
Commit-Queue: Florin Malita <a8262bf13ea8c26821e91ea9bca6740a77c96dcd@google.com>
Reviewed-by: Brian Osman <794c0b5534edf5601d88e1d41975d0262da12894@google.com>

aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,google/skia,google/skia