chore: default value to userLocationFastestInterval prop (#3397)

The default value can be found here https://github.com/react-native-community/react-native-maps/blob/bf032461adc0d843bab60e3c55b226629ca12e74/lib/android/src/main/java/com/airbnb/android/react/maps/AirMapManager.java#L173

docs/mapview.md

@@ -17,7 +17,7 @@
 | `showsUserLocation` | `Boolean` | `false` | If `true` the app will ask for the user's location. **NOTE**: You need to add `NSLocationWhenInUseUsageDescription` key in Info.plist to enable geolocation, otherwise it is going to *fail silently*! You will also need to add an explanation for why you need the users location against `NSLocationWhenInUseUsageDescription` in Info.plist. Otherwise Apple may reject your app submission.
 | `userLocationPriority` | 'balanced'\|'high'\|'low'\|'passive' | 'high' | Set power priority of user location tracking. See [Google APIs documentation](https://developers.google.com/android/reference/com/google/android/gms/location/LocationRequest.html). **Note:** Android only.
 | `userLocationUpdateInterval` | `Number` | 5000 | Interval of user location updates in milliseconds. See [Google APIs documentation](https://developers.google.com/android/reference/com/google/android/gms/location/LocationRequest.html). **Note:** Android only.
-| `userLocationFastestInterval` | `Number` |  | Fastest interval the application will actively acquire locations. See [Google APIs documentation](https://developers.google.com/android/reference/com/google/android/gms/location/LocationRequest.html). **Note:** Android only.
+| `userLocationFastestInterval` | `Number` | 5000 | Fastest interval the application will actively acquire locations. See [Google APIs documentation](https://developers.google.com/android/reference/com/google/android/gms/location/LocationRequest.html). **Note:** Android only.
 | `userLocationAnnotationTitle` | `String` | | The title of the annotation for current user location. This only works if `showsUserLocation` is true. There is a default value `My Location` set by MapView. **Note**: iOS only.
 | `followsUserLocation` | `Boolean` | `false` | If `true` the map will focus on the user's location. This only works if `showsUserLocation` is true and the user has shared their location. **Note**: Apple Maps only.
 | `showsMyLocationButton` | `Boolean` | `true` | If `false` hide the button to move map to the current user's location.