AEM 6.3 - How to read design properties within component helper for a dynamic editable template

I have a dynamic editable template with design dialog at page component. The design properties are persisted under /conf/myapp/settings/wcm/policies/myapp like this:

My requirement is to read these page level design properties and use them inside an Image component. I have design dialog at component level as well. So when I do ${currentStyle.property}, it renders the component level design property.

Next I wrote a helper class like this:

Designer designer = currentPage.getContentResource().getResourceResolver().adaptTo(Designer.class);
  Design pageDesign = designer.getDesign(currentPage);
  Style pageStyle = pageDesign.getStyle(pageDesign.getPath());
  return pageStyle.get(PROPERTY_ANALYTICSPAGETYPE, String.class);

This code is trying to read page level design properties under /etc/designs/myapp authored under cq:designPath and NOT reading under /conf policies. Now how I read the /conf policy nodes and access those properties?

How to access page level design properties within a component?