Settings: add Advanced menu for device-specific settings app

Change-Id: Ib022a224fe71522eb2432a112d2bdf64bc08c926
Signed-off-by: Chet Kener <Cl3Kener@gmail.com>

Conflicts:
	res/values/strings.xml
	res/xml/settings_headers.xml
	src/com/android/settings/Settings.java