Destination autocomplete for the onboarding "Where to?" screen.

Returns strings like "Paris, France", "Hawaii, United States", "Maui County, HI, USA", or "Japan". Includes cities, states/provinces, counties/regions, and countries so users planning a trip around a broader area (e.g. an island or state) can pick that directly instead of being forced to name a single city.

predictions carries the same rows with their place id and Google types attached. The display string cannot distinguish "New York" the city from "New York State"; the place id can, and the deck resolves a 49 km box for one and a 505 km box for the other.