Add collapsible banner ads

[Desechos]

Please, could you add the option of using collapsible banner ads?

https://developers.google.com/admob/android/banner/collapsible?hl=en

Thanks!

[DiasFranciscoA]

This is still a beta (experimental) feature for Google AdMob. We won't be adding this feature not until it comes out of the "experimental" state.

[vitito93]

@DiasFranciscoA @Desechos Hi! I just added native ads and collapsible banners for a client as a freelance order, where can I offer those changes?

[DiasFranciscoA]

Hello @vitito93 thank you for reaching out. To contribute you can create a PR to the repo and it will be reviewed. Note the PR must implement both Android and iOS versions of the extension or it won't be accepted. This is necessary to keep both implementations of the extension up-to-date.