[Frontend Polish] Address autocomplete

[eclipse-909]

Description

In the view itinerary page, the create/search event address input fields can take advantage of Google Maps API for address auto-completion.

Acceptance Criteria

• Address input fields use google maps autocompletion widget

Developer Notes

• I think it's this
• If someone picks this up, let Ethan know because you can't use the same API key, I have to make another one