Fixed wikimedia tiles not loaded in nearby map(Fixed commons-app#2335)

Author: zhao-gang

app/src/main/java/fr/free/nrw/commons/nearby/NearbyMapFragment.java

@@ -517,7 +517,7 @@ private void setupMapView(Bundle savedInstanceState) {
         MapboxMapOptions options = new MapboxMapOptions()
                 .compassGravity(Gravity.BOTTOM | Gravity.LEFT)
                 .compassMargins(new int[]{12, 0, 0, 24})
-                .styleUrl(Style.OUTDOORS)
+                .styleUrl("asset://mapstyle.json")
                 .logoEnabled(false)
                 .attributionEnabled(false)
                 .camera(new CameraPosition.Builder()
@@ -534,7 +534,6 @@ private void setupMapView(Bundle savedInstanceState) {
                 addMapMovementListeners();
                 updateMapSignificantlyForCurrentLocation();
             });
-            mapView.setStyleUrl("asset://mapstyle.json");
         }
     }