Fix cases of attachments with no name

* Most clients send name= in the content-type, but a few clients
  send only filename= in content-disposition.
* There was code to handle both cases, but due to two typos, it didn't
  work.
* Most easily reproduced by sending from hotmail/live web client.

Bug: 2366961
Change-Id: I1d9a00b9b5fd1094cfb8566c3248d94286a8ae91
2 files changed