LifeCycleManagerState constructor Null safety

1. smooth_app
2. lifecycle_manager
3. LifeCycleManagerState
4. LifeCycleManagerState constructor

LifeCycleManagerState class

1. Constructors
2. LifeCycleManagerState
3. Properties
4. appLifecycleState
5. hashCode
6. runtimeType
7. Methods
8. build
9. didChangeAppLifecycleState
10. dispose
11. initState
12. noSuchMethod
13. toString
14. Operators
15. operator ==