Fix exception being thrown if CMHW is not installed.

Happens during debugging when mmp'ing the app.

Change-Id: Ief84a812696ef3f2515701790f96649cbde0f7d9

Conflicts:
	src/com/android/settings/cyanogenmod/ButtonSettings.java
Change "Stay Awake" description to match behavior

Stay awake acts on "plugged in" state, not "charging" state.  Update description to accurately reflect this behavior.

Change-Id: Ibad7eb8b465f31d1b6d835348eb23962657fd892

Conflicts:
	res/values/cm_strings.xml
Fix duplicate notification light string

Change-Id: I6783672d4027a147cf5f942a4618826c367cf97a