Geofire Data Retrieve

### At first add local.properties file in project folder

In the app main CusotmerMapsActivity after login the job is to set marker on customer location and find driver near.

* first login as driver so that driver location is stored in firebase database in **driver available** topic
* Then login as customer in an other device and press call an ambulance

This process store customer location in firebase **customer request** topic. The it will find available driver from firebase. and set marker on driver location.

This process is failed to retrive driver location from firebase. I used GeoFire location retrive help from https://firebaseopensource.com/projects/firebase/geofire-android/

### The main problem in GettingDriverLocation() Function That fail to retrive location from geofire firebase.
### Code from line 237 (commented code) ~ 323

Video tutorial I followed
https://www.youtube.com/watch?v=8xR62ra1dlg&list=PLxefhmF0pcPl6gcWvrpTbjGO7rcMWY1jT&index=18