Zen: Use account name instead of calendar id in event conditions.

 - Migrate the existing calendar attribute in the event condition
   from a long calendar id to the calendar account name.  More
   portable across a backup/restore.
 - Also skip restoring transient state (like the current condition
   state) from restored automatic rules.

Bug: 17755700
Change-Id: I9bdb421d2209e3ce90873008665c254d67c788d2