Use new search pattern in People app

- Magnifying glass should go inside the EditText field
- "Done" button on keyboard should hide the keyboard
- When going to a search result (contact card),
the "up" button should return to the search results
and not relaunch PeopleActivity

Bug: 5081198
Change-Id: I32e103c39c40da26bfd12f1fa8cef000f33ee1c9