Serving mode UI changes with map overlay for location and locked map movements while serving.
Fancy serving mode animation like iOS has. Also trimmed down the address text to just the street name and number.
Disabled location updates while in serving mode. We'll have to add this back later to auto exit serving mode, but for now it's wasted network traffic.
Merge branch 'master' into servingModeUI
UI tweeks for the vendor home screen and serving mode.
Minor tweaks

- Map padding at the top removed since the address hud is gone.
- Slightly changed the accessbility strings. I ran TalkBack and it
 makes more sense this way.
Merge pull request #23 from TruckMuncher/servingModeUI

Serving mode ui