* We currently use the DisplayColorCalibration API for setting display
temperature which makes a lot of guesses about what temperature
the display really is. Some devices will support the new ColorBalance
API (via QDCM or other mechanism), which offers a calibrated
alternative. Add support for this, which will supercede DCC if
available.
* Additionally, define the available color temperature range as a
set of overlayable values so this can be specified per-device.
This range will be mapped to balance values using the power curve
calculations in the new MathUtils class.
Change-Id: I99608c09807b747d962680293c7b0cee8d669003
Steve Kondik