Cleans up userId loop in clearPackageStateForUser

This change fixes incorrect user ID references while clearing package
state in the case that it is being called with USER_ALL. Thankfully
this scenario can only take place when a non-system child package is
uninstalled for all users.

Fixes: 120814622
Test: atest AppSecurityTests
Change-Id: I462c383ad68efcde88eaacdb62dfcd6490f343e0