Enforce compileSdkVersion set in a plugin #91771
Description
I just tried bumping the compileSdkVersion in a plugin to be able to use an API available in Android S,
and none of the new symbols are defined when an app depends on this plugin.
It turns out this never worked in Flutter, and people have run into this issue without noticing that the app must
also bump the compileSdkVersion in order for this work.
This isn't a problem in native android because Android dependencies are distributed as AARs binaries with
metadata that specify the compileSdkVersion that the Android Gradle plugin must enforce.
The only option is left is to have the Flutter Gradle plugin enforcing the right compileSdkVersion.
Related issues: