Android N-Ify Xposed Module Bringing Android N Features to Older Phones
Android ( root , 5.0+): Unfortunately, the Android N preview is only available on select devices . However, you can try out some of the latest features on Android Lollipop and up with this Xposed module.
Android N-ify aims to provide several smaller and more useful Android N features on older rooted devices. It currently supports two minor but useful settings: it can display subtitles in the Settings app, and it lets you double-tap the Recents button to quickly switch apps. In the future, the developer plans to include improvements to Doze Mode, Night Mode, a new notification layout, and more. If you want to start using it, you can download Xposed and get the module from the source link below.
Android N-ify | Xposed Modules Repository via XDA