Fix application moves.

We don't dex2oat during application moves, so we must scan
the package again scanPackageDirtyLI to deduce its ABI.

This is unnecessary (since a move cannot change ABIs), but we
need some additional refactoring to avoid a second scan.

bug: 21337469

(cherry picked from commit cd251fa3)

Change-Id: Id1ed3bdfabb41e05e6a2f7efbd05d2103a67c663