MLKitScannerPageState constructor Null safety

1. smooth_app
2. ml_kit_scan_page
3. MLKitScannerPageState
4. MLKitScannerPageState constructor

MLKitScannerPageState class

1. Constructors
2. MLKitScannerPageState
3. Properties
4. hashCode
5. isCameraInitialized
6. runtimeType
7. stoppingCamera
8. Methods
9. build
10. didChangeDependencies
11. dispose
12. initState
13. noSuchMethod
14. toString
15. Operators
16. operator ==
17. Constants
18. postFrameCallbackStandardDelay