You can't. The Android platform team doesn't want apps doing this sort of thing because it's bad for both battery and memory usage when everyone does it. If you find a workaround that permits you to do it, it's very likely to break in a later version of Android. The foreground service notification is there to inform users that an app is running in this kind of unsustainable-at-scale manner and the user can make their own choice of whether to keep using the app or not. Use
https://firebase.google.com/docs/cloud-messaging to send messages to your app from outside when the user isn't actively using it instead.