[Settings] HW keys tweaks

Conflicts:
	res/values/cr_strings.xml
	res/xml/button_settings.xml
	src/com/android/settings/ButtonSettings.java
Settings: volume wake preference

Change-Id: I6a732e627b75a1be533ecd96cb018307de0e5a77
BootReceiver: remove duplicate DisplaySettings.restore(ctx);

Change-Id: I7c9130e4ba045e1a5c6db270c7301bc675a01b03
Build V1.8.1