LocationRequest constructor is marked as internal
LocationRequest initialization procedure has changed into latest Google Play Service dependencies ( > 12.0.0). Now you can use its create() method to initialize this. e.g.
LocationRequest request = LocationRequest.create();
Use static methodLocationRequest create ()
.
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
locationRequest.setInterval(5000);
locationRequest.setFastestInterval(1000);