As far as I can see it doesn’t improve that situation. The Google Play Store may be forced to list alternative app stores, but by default the only apps that will install on Android, no matter which store they are downloaded from, are those whose developer has registered with Google, and where Google has approved both the developer and the app. So Google can still censor any app or developer they (or the US Government) consider inconvenient.

Google promises a slightly laborious workaround for this, but they don’t say how long the workaround will remain available.