Add implementations for move and copy operations.

Previously, we didn't have these implemented so the
host OS would emulate them by pulling the object
and pushing it to a new location. This can result
in data being lost and it is slow.

With the operations implemented, moving objects
on the same storage is instantaneous since the data
doesn't need to move. Moving objects between storages
and copying objects are both much faster since no
data has to be moved through USB.

Bug: 66679910
Test: Move and copy objects, verify they are correct
Change-Id: I38c69eee41d883af46fa2f1b9e091193b2847e8c