NEClientType constructor Null safety

1. netease_roomkit
2. netease_roomkit
3. NEClientType
4. NEClientType const constructor

NEClientType enum

1. Constructors
2. NEClientType
3. Values
4. unknown
5. ios
6. android
7. pc
8. web
9. sip
10. mac
11. miniapp
12. Properties
13. hashCode
14. index
15. runtimeType
16. Methods
17. noSuchMethod
18. toString
19. Operators
20. operator ==
21. Constants
22. values