Add title and subtitle to navigation bar similar to Apple Music in IOS 11

According to WWDC 2017 Session 301 - Introducing the New App Store around 10:30, right when the Today interaction is displayed, it's just the section header of the collection view and not part of the UINavigationBar (there is none). Again, this is for the AppStore but It'd appear that's the same UI as Music.

Another interesting read about recreating the UI: Re-building the new app store app – today view