Follow up to EditSchema parser

- Now AccountType.addKind() throws DefinitionException instead of just logging.

- Now the test contacts.xml (= test_basic_contacts.xml) defines "event" and
"relationship" DataKinds too.  BUA should be able to copy this file.

- Added another xml, contacts_fallback.xml, to the test apk.
This defines what's equivalent to the fallback type.  Unittests load this file
directly and compares the result to the fallback account type.

- Cleaned up existing account definitions in order to make sure
contacts_fallback.xml is really identical to the fallback type. This includes:

** Now structured name, display name, phonetic name, and phone DataKinds
all have 'kind.typeOverallMax = 1'.

** The "assistant" phone type is no longer a custom column.  It's only used for
the fallback type and I don't think it's too critical.

- Also, NameKindBuilder no longer re-order phonetic fields, because no
other account types do this.  In the previous CL I did it because I thought
that'd be more "correct", but on the second thought it's probably not a good
idea to make too many non-critical changes at this point.

Bug 5381810

Change-Id: Ie6a4eb3b876ab22a3dcdb6a9c278e387f8166125