IWYU in SimpleColorMatrixAnimation

https://skia-review.googlesource.com/c/skia/+/571121 removes the include
from SkColorMatrixFilter to SkColorMatrix. This file uses the latter
directly, so include it.

This will fix a build breakage which is currently preventing a Skia
roll.

In addition, include SkColorFilter.h directly, now that we're no longer
using SkColorMatrixFilter (since
I01e29bd36ed3788c4f996092c81310c17f5039cd).

Bug: NA
Test: make
Change-Id: I8d1838538ef80f8cd07af82ce8dafd9118b378e6