Do not add default route during ifc_configure

Avoid duplicate default routes.
Remove adding of default routes during interface configuration as
route add/remove operation is managed by ConnectivityService via netd.
(cherry picked from commit 4a48635c72d91cf8decb7653948fe0c76de46098)

Change-Id: I982b95a44bf91d3850ca7752e307c1b1b6a66ecf
toolbox: Add levelFromUid categorization support to restorecon

This is necessary for the app data relabeling on migrated devices
to include the proper app context. Freshly installed apps get this
done automagically, as do newly created files.

Change-Id: If7421dac01c6ae8bd78e66f71e69298ed850a7ab
Merge remote-tracking branch 'omni/android-4.4' into android-4.4