t895/DNSNet ? reverse-engineered prompt

Build me an Android app that works like a DNS based ad and malware blocker.

I want it to use Android’s VPN service so it can watch DNS requests on the device, decide whether to block them, and let the user turn the service on and off easily. The app should have simple screens for starting, managing filters, choosing which apps are affected, and viewing DNS settings. It should come with a sensible default set of host lists that block ads, trackers, malware, and other unwanted domains, but still let the user customize things.

Please make it feel like a modern Android app, clean and fast, with a focus on privacy and on device filtering. If some parts need current Android or Rust build details, look up the latest docs online and use the best approach. Also make sure it can be built and run from the project with a straightforward debug setup.