Issue: investigate random fluctuations to render count between runs when using VirtualizedLists

[mdjastrzebski]

Summary

@TMaszko & @Xiltyn reported that under some circumstances render counts fluctuates by +/- 1 or +/- 2 between runs when applying Perf Tests on complex codebase. Theirs initial research pointed to update renders triggered by VirtualizedList/FlatList in situation of changing the underlying list data.

To Do

Investigate FlatList/etc impact of variable number of renders. Create test scenarios that try to replicate the random behavior and isolate it as much as possible in order to find root cause & possible solution or workaround.