Now, if you fail to authenticate on the credentials fragment,
instead of taking you to the full accountSetupIncoming,
it just takes you back to the credentials fragment with
a warning that your password is wrong.
Also, make it so that pressing "next" on the password IME behaves
the same as pressing the Next button.
Change-Id: Ice91c842659c33ba6f8ac876356a79265c703e2e
This doesn't work yet because the account type selection
screen doesn't not currently come up after the initial
setup screen. Also, right now we will always display the
cert selector, regardless of security type, because at
this point in the flow we haven't asked the user for that.
Change-Id: I8b4a13030cd6a4a8b243d7208d8df9798fd24bea
