No you need to build the Flex version of the panel for InDesign CC in Flashbuilder 4.5. Remember the InDesign CC is version 9 of InDesign.
BUT from the version following InDesign CC Flex may not be there (At present Adobe has only annonced that Flex is being removed in the future, beginning with the next version of Photoshop). So in the near future you should expect to convert your panel to HTML5. The latest update of InDesign CC added HTML5 support, ala Photoshop.