Revert "Settings: Hide voice wakeup category when package isn't present"

This reverts commit 11b4423130a1c6c0f47eff996565b133645cb055.
Revert "add Voice Wakeup switch"

This reverts commit f7b32c57440bd0a536584d22935333ba0a372993.

Conflicts:
	res/values/cm_strings.xml