ContactsContract: update SipAddress to be multi-valued

This is step (1) of the device-side changes to deal with SIP addresses
becoming first-class objects in focus.

It'll be multi-valued in focus, so make it multi-valued on the device
(just like Phone, Email, Im, etc.)

Possible types are CUSTOM, HOME, WORK, and OTHER.

Also while I was in there, fixed the typo in "TYPE_MAINDEN_NAME" in the
Nickname class.  (I can't remove it, since it's public API, so I added a
new constant with the correct spelling and deprecated the misspelled
one.)

Bug: 3004838

TESTED: on passion:

  - Flashed this change onto a device that already had a contact with a
    SipAddress, verified that it still shows up fine in the UI.

  - Wiped data, rerean SetupWizard and logged in, made sure that SIP
    addresses got synced down properly.

  - Edited SIP address on the device, made sure it got correctly synced
    up to the SIP user-defined field.

Change-Id: I6ecf551b64f87de03a7807e6212297d91f9e3981