anonymous->inner: do not generate public static class inside interface

java/java-tests/testData/refactoring/anonymousToInner/insideInterface_after.java

@@ -0,0 +1,10 @@
+interface M {
+  Runnable r = new MyRunnable();
+
+    class MyRunnable implements Runnable {
+        @Override
+        public void run() {
+    
+        }
+    }
+}