Handle "Sync" status 5 as an IOException

* Failure to do so leads to fast looping behavior and battery drain until
  the server fixes itself up.  Best to treat it as an IOException and use
  our built-in backoff behavior

Bug: 5135583

Change-Id: Ied7cfe09f5ae725d1c307ea48dd4bbf52f321c6a
1 file changed