add onBind to FileService to see if it fixes Java Language Tests failure

java/ql/test/experimental/query-tests/security/CWE-200/FileService.java

@@ -5,6 +5,7 @@ import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.AsyncTask;
+import android.os.IBinder;
 
 public class FileService extends Service {
     public static String KEY_LOCAL_FILE = "local_file";
@@ -27,6 +28,11 @@ public class FileService extends Service {
         return 2;
     }
 
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
     public class CopyAndUploadContentUrisTask extends AsyncTask<Object, Void, String> {
         public Object[] makeParamsToExecute(
             String sourceUri