livedisplay: Bugfixes and cleanups

 * Simplify the code and callback mechanisms
 * Fix bug where settings weren't applied at startup
 * Make stuff immutable where possible
 * Corrected the sunrise calculation to start on time
 * Fix issue where tile state could become out of sync
 * Don't spam the hardware on screen on/off
 * Stop trying to cache values in so many places, they get out of sync
   too easily.
 * Move the animator to the general display adjustments
 * Clean up outdoor mode state on screen toggle

Change-Id: Ic14425e5294d78698b9280dfb1237b222bb706cc