[Android] Tag support for Nextcloud Bookmarks

[sunjam]

Describe the feature you'd like to request

Tag support when available from Bookmarks app in Nextcloud.

Describe the solution you'd like

Display tags below title.

Eventually, use tags to filter through related bookmarks. See #1114 for sorting alphabetically.

Describe alternatives you've considered

Browse to Nextcloud Bookmarks app.

[cal940]

also interesting for iOS app