DO NOT MERGE: Allow "recovery password" as a valid policy

* The specifications allow us to ignore its value if we don't actually
  intend to send one to the server
* Backport of I86c158a03b03c33c174056fc2b7fcc2c9fba42e6

Bug: 4347726
Change-Id: Ic059ac40ee9b48e58c53c15256aaa4029fa61c5a
1 file changed