Save yourself the hassle of rooting your stock Android Oreo device altogether with Andromeda, the rootless theming support plugin for Substratum. Take over control of the finest aspects of the system UI and personalise your Android experience without limits.
Andromeda is an add-on app to enable rootless mode in Substratum. Get Substratum for free here: https://play.google.com/store/apps/details?id=projekt.substratum
Google is preventing stock OMS users from utilising custom overlays. To help us bring back rootless theming support to Android, please star the following issue in Google’s Issue Tracker: https://issuetracker.google.com/issues/74354703.
• Desktop computer: used to activate rootless theming mode
• Andromeda desktop client: https://forum.xda-developers.com/apps/substratum/andromeda-desktop-clients-release-notes-t3668682
• ADB client: https://forum.xda-developers.com/showthread.php?t=2588979
Detailed guide: https://forum.xda-developers.com/apps/substratum/official-starting-substratum-andromeda-t3798316