StreamTypes constructor Null safety

1. millicast_flutter_sdk
2. millicast_flutter_sdk
3. StreamTypes
4. StreamTypes constructor

StreamTypes class

1. Constructors
2. StreamTypes
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Constants
12. rtmp
13. webRTC