Android tv compatibility

[stuartwk]

• [ ] Investigate crash on load (https://github.com/bringyour/android/issues/170)
• [x] Locations list support
• [x] Check animation when navigating verify -> main
• [x] Check animation from guest account -> main
• [x] Search input focus hover state
• [x] Account switcher focus states
• [x] Catch back/exit key to close overlays
• [x] Guest mode request focus for terms checkbox
• [x] Better button focus states (specifically google login and guest overlay "enter" button)
• [x] Refer and earn QR code huge on any landscape device (#171)