Replace getClass() which uses reflection with explicit class (#123)

Author: elliotykim

datafile-handler/src/main/java/com/optimizely/ab/android/datafile_handler/DatafileService.java

@@ -47,7 +47,7 @@ public class DatafileService extends Service {
     static final String DATAFILE_VERSION = "3";
 
     @NonNull private final IBinder binder = new LocalBinder();
-    Logger logger = LoggerFactory.getLogger(getClass());
+    Logger logger = LoggerFactory.getLogger(DatafileService.class);
     private boolean isBound;
 
     /**