TrackingCallbackData constructor Null safety

1. face_sdk
2. face_sdk
3. TrackingCallbackData
4. TrackingCallbackData constructor

TrackingCallbackData class

1. Constructors
2. TrackingCallbackData
3. Properties
4. frame_id
5. hashCode
6. runtimeType
7. samples
8. samples_active_liveness_status
9. samples_quality
10. stream_id
11. Methods
12. noSuchMethod
13. toString
14. Operators
15. operator ==