NERtcVideoConfig constructor Null safety

1. netease_roomkit
2. netease_roomkit
3. NERtcVideoConfig
4. NERtcVideoConfig constructor

NERtcVideoConfig class

1. Constructors
2. NERtcVideoConfig
3. Properties
4. bitrate
5. cameraType
6. degradationPrefer
7. frameRate
8. frontCamera
9. hashCode
10. height
11. minBitrate
12. minFrameRate
13. runtimeType
14. videoCropMode
15. videoProfile
16. width
17. Methods
18. noSuchMethod
19. toString
20. Operators
21. operator ==