Firebase Integration for Deployment

[hungngo97]

Since we are going to deploy soon, I think integrating with multiple Firebase products can be great for us:

• Performance Monitoring: to see how our app performs across devices.
• Google Analytics: to view overall user's distribution, countries, population, etc.
• A/B Testing: to see how users react to different UI components.
• Remote Config: change various parameters (accuracy threshold, snooze time, etc.) and see how people evaluate the user experience.

[akkaneror]

Intended for 1.1 release.
Marked by Hung