Add missing sources jar into published android artifacts (#32982)
Add missing sources jar into published android artifacts (#32982)

Summary:
when migrated to `maven-publish` in https://github.com/facebook/react-native/issues/31611, the sources jar is not included by default from `maven-publish`. so react-native 0.66 / 0.67 doesn't include sources jar in npm published artifacts. it's not ideal for debug or tracing code.

this pr added the sources jar into the published artifact.

## Changelog

[Android] [Fixed] - Add missing sources jar into published android artifacts

Pull Request resolved: https://github.com/facebook/react-native/pull/32982

Test Plan:
make sure sources jar is included in artifact.

```
$ ./gradlew :ReactAndroid:installArchives
$ find android -name '*sources.jar*'
```

Reviewed By: ShikaSD

Differential Revision: D33842979

Pulled By: cortinico

fbshipit-source-id: f99ad46ce0cca0cfc2ab1d5c5a4fcb40a02683e7

facebook/react-native,facebook/react-native,javache/react-native,janicduplessis/react-native,javache/react-native,javache/react-native,javache/react-native,facebook/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,facebook/react-native,janicduplessis/react-native,facebook/react-native,javache/react-native,facebook/react-native,janicduplessis/react-native,javache/react-native,janicduplessis/react-native,janicduplessis/react-native,facebook/react-native,javache/react-native,javache/react-native,janicduplessis/react-native,janicduplessis/react-native,facebook/react-native