Use ItemRowAdapterHelper.setItems for more row types

[nielsvanvelzen]

When resuming a fragment with an paged adapter that had an item focused after the first page the leanback library would try to focus an item that wasn't ready yet. I fixed this in #2246 for ItemQuery but we also use pages for artists and a few other types.

Changes

• Use ItemRowAdapterHelper.setItems for artists
• Use ItemRowAdapterHelper.setItems for views
• Use ItemRowAdapterHelper.setItems for search results
• Use ItemRowAdapterHelper.setItems for latest items
• Filter out null values in ItemRowAdapterHelper.setItems

Issues

Fixes #2260