SysUI Tuner: Night mode v3

TwilightService:
 - Add support for locking on/off twilight globally
 - Change twilight state to have float amount rather than
   having clients calculate it using the sunrise/set values
 - State controlled through secure setting
 - Override mode which locks to a state for a couple hours then
   resets
 - Add broadcast for SysUI to listen to

Brightness/Power:
 - Updates to handle TwilightService changes
 - Added secure setting to control whether or not to use
   twilight when calculating brightness.

Tuner:
 - UI Overhall
 - NightModeController will set the values of the custom color matrix
   taking into account the current twilight service state and any
   custom calibration set by the user.
 - Probably other stuff.

Change-Id: I213f1f76a143e711c507b2ba7d784f581bfc32b4