Adding Final Phase {Deduped:Count} Objects

This adds similar {Deduped:Count} logging to the final phase.
However, due to the redundancy of data types, collections are generated
to reduce some repitition. To ensure safety, the collections are made to
be immutable.

Bug: 271135048
Bug: 270568738
Bug: 278591970
Test: Build Complete, E2E In Progress (Won't Submit till Done)
Change-Id: Id69a54532480bd5a998731b41926f5d72699c3c9