These changes allow to override existing native endorsed (federated & inline) plugins with e.g. non-endorsed plugin implementations via direct dependencies as described in the section *Platform implementation selection* in the [design doc](https://docs.google.com/document/d/1LD7QjmzJZLCopUrFAAE98wOUQpjmguyGTN2wd_89Srs).
```yaml
# pubspec.yaml
name: example
dependencies:
my_plugin: ^0.0.1
my_plugin_android_alternative: ^0.0.1
```
Closes#80374, closes#59657
Related: Override Dart plugins (#87991, #79669)
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