[2/2] Settings: Hide power menu on lockscreen

also add buttons screen

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	res/values/custom_strings.xml

Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	res/xml/security_settings_misc.xml