add Voice Wakeup switch

 * Requires CYNGN package to do the actual work.

Change-Id: I1c129adf1104dd95d3afb76224af4c9ba2b5db96
Launch SuperSU from Settings
[2/2] Battery light: 100% charged level
[2/2] Smart pulldown
[2/2] Quick unlock
[2/2] Keypad shuffler