Halo: Add master switch to disable Halo (2/2)

PS2: Switcheroo

Signed-off-by: Dan Trifan <jimsth@gmail.com>

Conflicts:
	res/values/strings.xml
	res/xml/tool_bar_settings.xml
	src/com/android/settings/paranoid/Toolbar.java

Change-Id: I68ba6d2c5e3a43e153bdc2a44a3f556bfad99744