Update Ushahidi Mobile app to use the new analytics firebase setup

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Problem

• Google Analytics Services SDK has been deprecated therefore we aren't getting analytics data on this.

Suggested solution by Google

• "The good news is that the latest solution using the Firebase SDK is even more intuitive and includes free and unlimited event reporting to meet the needs of app-centric businesses."
• https://support.google.com/firebase/answer/6317479 they link to this article as well, and this one https://support.google.com/analytics/answer/7388022

Affects

• Ushahidi Mobile (Ionic) (UA-12063676-34).