Adds app enumeration dumps

This change adds app enumeration-related data to dumps / bug reports.
Also realized that we were adding duplicates to the implicitly visible
list and so moved everything to sets to guard against similar bugs /
inefficiencies going forward.

Test: manual
Bug: 136675067
Change-Id: Id4f94c8b5bc3a2102bdc7d0083ad435bb053c6ad