Summary:
There were 2 situations where the UI hadn't changed but we were sending a nodes with a different Id accross traversals which confuses things on the desktop
1. By removing the litho observer we are repeatidly scanning the entire hierachy on scroll or when a video plays. The debug component that represents litho views are not stable, they are generated each time even if the underlying component is the same
2. Offset child is generated by us each time and the old id refered to the generated offset child not the underlying object
This diff addresses these 2 cases by allowing a descriptor to choose the ID.
The nodeId convience method was used in a lot of places. For the places where the id ended up in the protocol we have migrated to the descriptors getID. In some other places it is only used internally or for logging. In this case I have renamed the method and changed the return type from Id to int so it cant be accidently used in the protocol
Reviewed By: lblasa
Differential Revision: D41307239
fbshipit-source-id: 655b230180a6d02d66888e86b2293eead3385455
0ebedc9c49