Handle EAS type 1 folders (user-created)

* If a type 1 folder has an mail folder as a parent (at any level),
  it is also a mail folder (and therefore, we should have it in our
  folder list)
* Before rejecting type 1 folders, look for parents and accept those
  that are mail folders
* Add unit test to verify logic

Bug: 2978410
Change-Id: I44cda1d1c1fd7f3976af53a1672736201cc995ff
2 files changed