Since sideloading is being disabled, can you tell me how to block system updates

* "Let's talk security: Answering your top questions about Android developer verification": https://android-developers.googleblog.com/2025/09/lets-talk-... (android-developers.googleblog.com/2025/09/lets-talk-security-answering-your-top.html)

* "Answering questions about Android developer verification": https://news.ycombinator.com/item?id=45428832