add Voice Wakeup switch

 * Requires CYNGN package to do the actual work.

Change-Id: I1c129adf1104dd95d3afb76224af4c9ba2b5db96
Merge remote-tracking branch 'cm/cm-12.0' into cm-12.0

Conflicts:
	res/values/cm_strings.xml
	src/com/android/settings/DevelopmentSettings.java