Add support for allow-permission extension.
This will grant a sharedUserId arbitrary permissions as defined by XML files
in /system/etc/permissions.

Change-Id: I4c0be56173b89621c4cc7ae589715a030931e8d5
PackageManager: fix app lib migration for device with /datadata

For devices using /datadata, dataPathString will point
to /datadata while nativeLibraryDir will point to /data/data.
Thus, compare to /data/data directly to avoid problems.

Change-Id: I11149cf9cc5a573cc85513e12d3569b514f5ffb5
Fix package and notification manager derp