[multi part] Moving Empty/Error/No Results view and Info/Error bar into

DocsHolders.

This still currently only has one of info/error as opposed to all of
them. I will split them up and include them both if Cursor has them on a
follow up.

Also:
- Removed all things regarding "hidden model ids"
- Added more files & and a folder that throws Exception in DemoProvider

Bug: 33399053
Bug: 32972298
Change-Id: I612fc3990a3e2b6fe0e779de4de24bd65ab47933