Add Display Auto White Balance to ColorDisplayService

This change adds Display Auto White Balance to ColorDisplayService.
Given panel chromaticity data, a nominal white point, and a desired
correlated color temperature (CCT), this logic generates and applies a
matrix transform to shift the nominal white point to match the desired
CCT.

Bug 116516917

Change-Id: I07e341881a020a130944217fff372003edac0a8c