ConstantExpressionVisitor: for class access expression return the operand type

Before for String.class the "Class<String> type was returned (instead of simply "String" type). This was usually fine, but for int.class and Integer.class the same "Class<Integer>" type was returned, despite the constants are different.

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/defaultAnnotationParamValue/before5.java

@@ -0,0 +1,10 @@
+// "Remove redundant parameter" "false"
+
+@interface Anno {
+  Class foo() default void.class;
+}
+
+@Anno(foo = Vo<caret>id.class)
+class Foo {
+
+}