Move Im and SipAddress to legacy field

Legacy field support delete and copy (no insert)
Legacy field container will be remove once all children are removed.

Screenshots:

1. Legacy section with SipAddress and Im: https://screenshot.googleplex.com/8okHE6rDPpE4nqu.png
2. Copy Im: https://screenshot.googleplex.com/9AMDNPAjinpDfbg.png
3. Remove Im: https://screenshot.googleplex.com/7yfdnzV3xhBqfPa
4. Remove all: https://screenshot.googleplex.com/52xDnmsk7CPeFEW.png

Test: manually opened the editor screen with legacy mimetypes
Bug: 313983836
Change-Id: Icadaa89ef42808d0601f12cf00c7e7e5910b4abc