Revert "Settings: Bring back Maximize widgets (2/2)"

This partialy reverts commit b7ddd93a608843656762da3b168c015bb82b273e.

- I keep lockscreen option in settings headers since some ports are inside

Conflicts:
	res/xml/lockscreen_interface_settings.xml
	res/xml/settings_headers.xml
	src/com/android/settings/SecuritySettings.java

Change-Id: I1844b8df7228ae2fb771b1bd384e37dcfa294c12