fix: do not output private properties.

Previously we were checking the visibility of the property type, but
the correct check uses the jsdoc of the property itself.

Author: rkirov

src/main/java/com/google/javascript/cl2dts/DeclarationGenerator.java

@@ -860,7 +860,7 @@ private void visitProperties(ObjectType objType, boolean isStatic, Set<String> s
         String qualifiedName = objType.getDisplayName() + "." + propName;
         if (provides.contains(qualifiedName)) {
           continue;
-        } else if (isPrivate(propertyType.getJSDocInfo())) {
+        } else if (isPrivate(objType.getOwnPropertyJSDocInfo(propName))) {
           continue;
         } else if (propertyType.isEnumType()) {
           // For now, we don't emit static enum properties. We theorize it should not be needed.

src/test/java/com/google/javascript/cl2dts/provide_single_class.js

@@ -12,6 +12,8 @@ foo.bar.Baz = function() {
   // concerned `avalue` lives on the prototype object.
   /** @type {string} */
   this.avalue = 0;
+  /** @private {number} */
+  this.hideMe_ = 0;
 };
 
 /**