Fix SmartReply/SmartForward in EAS 2.5

* We inadvertently broke this with a recent update that uses Uri
  encoding for ItemId and CollectionId in SmartForward/Reply commands.
  We need to allow colon (:) however for EAS 2.5; otherwise, sends
  fail with HTTP 500
* Update unit test

Bug: 2821684
Change-Id: Ia6bdd2169513d1c13a8174dd599477a35df950f2
2 files changed