drive: fix missing files when using --fast-list and --drive-shared-with-me
drive: fix missing files when using --fast-list and --drive-shared-with-me

This bug was introduced here by removing some necessary code detecting
shared with me items at the root with no parents.

4453fa4ba64f6729 "drive: fix --fast-list when using appDataFolder"

This fix reverts that part of the patch.

Fixes #4018

ncw/rclone,ncw/rclone,ncw/rclone,ncw/rclone