AlbumRepository constructor Null safety

1. next_photo
2. features
3. AlbumRepository
4. AlbumRepository constructor

AlbumRepository class

1. Constructors
2. AlbumRepository
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. getAlbum
8. getAllAlbums
9. getUserAlbums
10. noSuchMethod
11. toString
12. Operators
13. operator ==