US-65: Integrate Firebase

[a-paggabao]

As a user, I would like to be able to synchronize my Google Calendar Events into the apps' queued routes.

A New Firebase Project is required to use Google Calendar Api:

• Google Calendar Authentication depends on Firebase Authentication, type Google
• By creating a Firebase project, Cloud Firestore can easily be enabled.

Associated epic: #19 Duplicate: #9

Tasks:

• [X] Create Firebase project 'NavConU'
• [X] Setup Authentication sign-in method from Firebase &nbsp&nbsp&nbsp&nbsp&nbsp Note: Must be logged in as navconu@gmail.com
• [X] Create Web Api Key for Google Calendar Api. &nbsp&nbsp&nbsp&nbsp&nbsp See Slack message at #General
• [X] Create Firestore Database &nbsp&nbsp&nbsp&nbsp&nbsp Note: Must be logged in as navconu@gmail.com

Acceptance criteria:

Step #	Execution Procedure or Input	Expected Results/Outputs	Passed/Failed
1	User navigates to app settings page	Option to log into Google account should be present	Passed
2	User logs into Google account	Should be able to select among multiple calendars	Passed

Mockups: