Some native objects captured by the memory profiler always have 0 references, even though they should have some references. eg: Sprites not being referenced by SpriteRenderers or SpriteAtlases. This regression was brought in by the native connections overhaul which landed in the 2019.3.0b8.

Reproduction steps:
1. create a new scene
2. create a sprite atlas asset
3. use any default resource sprite or one of your choosing and have the atlas reference it
4. create a sprite object inside the scene
5. Install the memory profiler package
6. take a snapshot
7. open the snapshot
8. navigate to the native objects table from the tables dropdown
9. filter the type name by : "Sprite"

Expected:
The sprite native object should have at least 3 references. Clicking on the references will show connections to both the SpriteAtlas and it's SpriteRenderer

Actual:
The sprite native object has some number of references(1 or 0, depends if the managed shell is in memory or not). Clicking on the references will not show the SpriteAtlas and SpriteRenderer reference it

Reproduced on trunk 2020.2a6, no need to reproduce on 2020.1/19.3 as the code did not change in between.