NERtcVoiceBeautifierType constructor Null safety

1. netease_roomkit
2. netease_roomkit
3. NERtcVoiceBeautifierType
4. NERtcVoiceBeautifierType constructor

NERtcVoiceBeautifierType class

1. Constructors
2. NERtcVoiceBeautifierType
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Constants
12. bedroom
13. church
14. clear
15. ktv
16. live
17. magnetic
18. mellow
19. muffled
20. nature
21. off
22. recordingStudio
23. remote