Finish System to Post Activities to Database

[BlakePatterson]

To post an activity to the database, the current component should call FirebaseHelper.postActivity()

Activities should be posted to the database when:

• User arrives at a new location & redeems a token
• User leaves a review (the activity should not contain the review itself, just the fact that the user left a review)
• etc

Note: you can add different activity events as you see fit, but do not change the design just to add a new activity event