Summary:
Adds listing of account Shared Drives through the url 'gdrive:/account@gmail.com/Shared Drives/'.

Supported operations:
- Create via 'Create New' -> 'Folder...'
- Delete (if empty)
- Rename

Discussion in {T10630}

Reviewers: elvisangelaccio

Reviewed By: elvisangelaccio

Subscribers: #kio_gdrive

Tags: #kio_gdrive

Differential Revision: https://phabricator.kde.org/D23804