lights: Make sure the lights are out

 * Annoying situation where the battery charging LED comes on in
   the crypto startup screen, but never gets turned off because
   of caching.
 * Explicitly turn off LEDs after the bootanimation completes, and
   always set the full state to the hardware on the first call
   regardless if it's all zeros.

Change-Id: I8cd2325ec5d8924391e4fc62249f6dd737d52f3e