Fix some problems with ASECs

On devices that had external storage, permissions weren't set correctly
on non-forward-locked applications. Also, moving forward locked
applications didn't work since DefaultContainerService wasn't able to
read it.

Fixed some faulty unit tests as well.

Bug: 6427212
Change-Id: I5c1f0bf5278549069c78939f0708c4c43a7d4006