I really don't see how Google will make Samsung and the big Chinese Android phone manufacturers (Xiaomi, OnePlus, ...) put this crap on their own custom Android distributions, especially because all these guys know that if they do it will have a very severe cost -- Besides Play and the Galaxy Store F-Droid is probably the third most popular distribution channel for Android apps on Galaxy devices, for example.

So I do think the only people who will be really affected by this are those running Google's own Pixel devices which are entirely locked into the Play ecosystem. The rest not so much.

It's already installed on every Google-certified Android device through the Google Play Services

It's part of Google Play Services, so it's already integrated into Xiaomi, OnePlus etc phones.

Google is used to put their shit into the Google Play Store contract they have with manufacturers.

Samsung, XiaoMi and OnePlus will let this pass because that will be that or losing access to Play Store. Oh and also they frankly don’t care at all because 99% of people will not know.

Android distribution are already incredibly shitty and most people are used since the 90s to have their computers and now their phones full of junk software. The average smartphone is not that different from the average windows XP/Vista PC of the 2000 era, with crapware everywhere, apps that are doing a lot of malicious things without the user even knowing (or frankly, caring).

For you and me it’s something unacceptable, but for most people it’s just the nth layer of enshitification.