SmoothViewFinderState constructor Null safety

1. smooth_app
2. smooth_view_finder
3. SmoothViewFinderState
4. SmoothViewFinderState constructor

SmoothViewFinderState class

1. Constructors
2. SmoothViewFinderState
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. build
8. dispose
9. noSuchMethod
10. toString
11. Operators
12. operator ==