[java8] Added tests for using java language features in transformations.

test/transform/resource/after-ecj/ValDefault.java

@@ -0,0 +1,7 @@
+interface ValDefault {
+  int size();
+  default void method() {
+    final @lombok.val int x = 1;
+    final @lombok.val int size = size();
+  }
+}