Switch to open source superuser

Change-Id: I0882b4bb296af041ec5766ff29a605554f13b0a7
Hide Superuser entry if root access for apps is disabled.

Change-Id: Ibb77ba5a0fccf22564a26b8b1e13f7762c65718e

Conflicts:
	src/com/android/settings/Settings.java

Conflicts:
	src/com/android/settings/Settings.java
Move Superuser header below Developer Options

Change-Id: Ica85aae0d3f06e6c5e837946cfc893d9e2f4fb7d

Conflicts:
	res/xml/settings_headers.xml

Conflicts:
	res/xml/settings_headers.xml