TXLiveVoiceChangerType_2 property Null safety

1. tencent_trtc_cloud
2. trtc_cloud_def
3. TXVoiceChangerType
4. TXLiveVoiceChangerType_2 property

TXVoiceChangerType class

1. Constructors
2. TXVoiceChangerType
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Static properties
12. TXLiveVoiceChangerType_0
13. TXLiveVoiceChangerType_1
14. TXLiveVoiceChangerType_2
15. TXLiveVoiceChangerType_3
16. TXLiveVoiceChangerType_4
17. TXLiveVoiceChangerType_5
18. TXLiveVoiceChangerType_6
19. TXLiveVoiceChangerType_7
20. TXLiveVoiceChangerType_8
21. TXLiveVoiceChangerType_9
22. TXLiveVoiceChangerType_10
23. TXLiveVoiceChangerType_11