add Voice Wakeup switch

 * Requires CYNGN package to do the actual work.

Change-Id: I1c129adf1104dd95d3afb76224af4c9ba2b5db96

Conflicts:
	proguard.flags

This class was added in https://github.com/crdroidandroid/android_packages_apps_Settings/commit/f8af552ad47ba4a5c3c8cf89e84ccb872d48354a
	src/com/android/settings/cyanogenmod/ShortcutPickHelper.java