* Add RgbaMatrix interface implementation.
* Add Builder class for easy adjustments.
* Adjust existing RgbaMatrixPixelTests to use new RgbAdjustment class.
PiperOrigin-RevId: 465545429
(cherry picked from commit a76dbfd363e2d167b13d2bcd978979bcfd69b071)
* OpenGL automatically clamps the output colors to the [0, 1] interval.
PiperOrigin-RevId: 465071999
(cherry picked from commit 2347db5d7484b161f6389846e6cde5b0ac1ed7a6)