livedisplay: Implement active display adjustment

 * LiveDisplay is our new name for the various display technologies
   which adjust the screen based on environmental conditions other
   than the standard automatic backlight controls.
 * This patch implements automatic color temperature adjustment based
   on time of day. This is similar to f.lux or Redshift. My eyes are
   so happy now!
 * Automatic outdoor/SRE feature is now handled here.
 * Handling of CABC/CABL and color enhancements also handled here.
 * Manual RGB tweaking is handled here.
 * Can delegate to DisplayColor HAL if available, otherwise uses
   SurfaceFlinger's 1015 operation to apply changes.
 * Happily coexists with the new accessibility features for color
   blindness correction and color inversion.
 * All postprocessing will be disabled when powersave mode is
   activated.

Change-Id: Iac1b74f410957f8e2d8290465c4ce9cc1fd97a88