NERtcConnectionType constructor Null safety

1. netease_roomkit
2. netease_roomkit
3. NERtcConnectionType
4. NERtcConnectionType constructor

NERtcConnectionType class

1. Constructors
2. NERtcConnectionType
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Constants
12. bluetooth
13. cellular2g
14. cellular3g
15. cellular4g
16. cellularUnknown
17. ethernet
18. none
19. unknown
20. vpn
21. wifi