docs: Added callouts related to obsolete contacts data fields.

Also added callouts for fields that no longer sort results based on
contacts frequency.

Bug: 116422556

Test: make ds-docs -j32

Change-Id: I738e08bd4686e30b875fa37123ecebb4a5e179d3
Merged-In: Iddcd0b41b6ad991423a5ced78522a9ab2ad831a1