Precisely this. There needs to be an API that all apps have to use not only for notifications but also for getting your contacts, your phone's location, etc. that is spoofable by the user. Or better yet, an AI program that runs entirely on the phone and does the spoofing automatically and entirely on behalf of the user.
Let the enshittified apps' ads interact with your AI agent and steal your fake "data" in the background without bothering the user.
Also important: It must be IMPOSSIBLE for any app to detect that its requests are being intercepted by your agent. (If they can tell, they'll refuse to work until you give them direct access.)
This is a real killer app for AI but you'll never get VC funding to build it.
But of course you need a rooted phone, and rooted phones can't run banking apps, tap-to-pay, Netflix, Pokemon Go, blah blah..
The notification "firewall" is probably not impossible to make. I use Pushbullet, it mirrors notifications to my computer (to the browser extension to be exact), and I can already dismiss notifications coming into my phone from the computer. It should be possible to make an app that intercepts all notifications, analyzes their contents and dismiss them if they're spam...
Let the enshittified apps' ads interact with your AI agent and steal your fake "data" in the background without bothering the user.
Also important: It must be IMPOSSIBLE for any app to detect that its requests are being intercepted by your agent. (If they can tell, they'll refuse to work until you give them direct access.)
This is a real killer app for AI but you'll never get VC funding to build it.