Don't crash good-citizen restore session clients

If an app is trying to do the right thing and end its restore sessions
cleanly, but winds up being slow and having the session timed out from
under them, don't crash them with an illegal state exception for having
appeared to end the session twice.

Bug 17133115

Change-Id: I0a0989e2067b156569bddb6626ce045e625c6604
1 file changed