Hide Superuser entry if root access for apps is disabled.

Change-Id: Ibb77ba5a0fccf22564a26b8b1e13f7762c65718e

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

 Changes to be committed:
	modified:   src/com/android/settings/DevelopmentSettings.java
	modified:   src/com/android/settings/Settings.java