Configuring the Application: faces-config.xml
ADFc is an extension to the JSF controller. This means that managed beans configured in the facesconfig.xml file are also accessible if your application uses ADFc for navigation. The search order is such that the reference to a managed bean is first resolved to facesconfig.xml. If the bean is not found there, the ADFc configuration file is referenced.
Although you can use both faces-config.xml and adfc-config.xml for configuration, Oracle recommends that you use one approach consistently. Because unbounded task flows are ADFc functionality and therefore are configured in adfc-config.xml, it may be best to use that file for managed bean configuration also.