Fix @react-native/popup-menu-android not building for 3rd party developers (#49212)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/49212

Currently, developers can't use `popup-menu-android` at all because the Gradle file we publish is referencing
internal machinery.

I'm adding a pre-publish script that manipulates the Gradle. This is the easiest solution without having to do
crazy setup inside RNGP or having duplicated version codes around in the monorepo.

Fixes https://github.com/facebook/react-native/issues/49112

Changelog:
[Android] [Fixed] - Fix react-native/popup-menu-android not building for 3rd party developers

Reviewed By: cipolleschi

Differential Revision: D69192874

fbshipit-source-id: 9f9e8a0a6e76308e598a09f4c70dbc659c238b00