Modified extra whitespace lines in source code

Code is much easier to read if there isn't too much of a gap between
lines. Primarily converted multi-line gaps into single line gaps.

app/src/main/java/fr/free/nrw/commons/HandlerService.java

@@ -32,7 +32,6 @@ public abstract class HandlerService<T> extends Service {
         public HandlerService getService() {
             return HandlerService.this;
         }
-
     }
 
     private final IBinder localBinder = new HandlerServiceLocalBinder();