Cleanup: use lambda instead of runnable.

src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java

@@ -150,12 +150,7 @@ public class TrackRecordingService extends Service {
             if (locationExecutorService == null || locationExecutorService.isShutdown() || locationExecutorService.isTerminated()) {
                 return;
             }
-            locationExecutorService.submit(new Runnable() {
-                @Override
-                public void run() {
-                    onLocationChangedAsync(location);
-                }
-            });
+            locationExecutorService.submit(() -> onLocationChangedAsync(location));
         }
 
         @Override