Cleanup removed package's data immediately.

+postpone UI update only

We don't have a good way to know if the package was fully removed, or
moved to /data/app. As this is all done during startup, we can't stop
and process removals before scanning different partitions.

Bug: 295047859
Bug: 245997611
Fixes: 295047859
Test: presubmit
Change-Id: Ib7bdff7e2fb80c2d7dfbf3b566e18bbbcf67b8b5