generate visibility setting for create from usage, generate getter/setter/constructor (IDEA-120662, IDEA-64613, IDEA-122025)

java/java-tests/testData/codeInsight/generateConstructor/afterPrivateClass.java

@@ -1,6 +1,6 @@
 class Test {
   private class Foo {
-      private Foo() {<caret>
+      public Foo() {<caret>
       }
   }
 }