Use correct EAS protocol version in Outbox (fixes #2319892)

* We inadvertently failed to set the EAS version in EasOutboxService,
  so the default of 2.5 is used
* This works, but SmartReply/SmartForward were enhanced in 12.0 and we
  aren't taking advantage of those changes
* The fix is to set the version using common code

Change-Id: I3b505448003f340681deeb8fb22e61e9dd8d10a0
1 file changed