fix visibility of private inner classes in annotations arguments of a sibling class (IDEA-168927)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/advHighlighting6/PrivateClassReferencedInAnnotationOnSibling.java

@@ -0,0 +1,10 @@
+class Main {
+
+  @interface Anno {
+    Class value();
+  }
+  private static class A {}
+
+  @Anno(A.class)
+  class U {}
+}