Hello, I'm an Android developer for the automotive industry with specialization in cybersecurity.
I can create a detailed guide of how to install the application as a system application.
Three notes:
* If you want the system app to be available for multi-users you NEED to perform the steps on the guide for every user, there's no magic here unless you are installing apps through the play store.
* The device NEEDS to be rooted.
* If you want to skip any permission requests, I need to know what those permissions are.
Send me a message today and I will schedule time for you this next week.