[3/3] Settings: Built-in superuser

PS2: Fixed formatting issues

Change-Id: Ia38f5a7737b7aff1d4d8291285dd1a17a5e63c1e
Signed-off-by: Parthipan Ramesh <parthipan.ramesh@gmail.com>
Merge branch 'kitkat' of github.com:AOSPA/android_packages_apps_Settings into kitkat