Revert "Prevent side channel package installation enumeration"

This reverts commit 89430735.

Reason for revert: broke tests, see b/213434244

Bug: 185477439
Bug: 213434244
Change-Id: I7a8fd6086ea59463ef73ade40663cc55b926eaca
Signed-off-by: Giuliano Procida <gprocida@google.com>