am 55f8ac79: am f46a9cf3: API to combine LOOKUP_KEY and Contacts._ID together.

Merge commit '55f8ac79bffc543ee2e2b486e0620bd73c36732a'

* commit '55f8ac79bffc543ee2e2b486e0620bd73c36732a':
  API to combine LOOKUP_KEY and Contacts._ID together.