[pm] fix missing PACKAGE_CHANGED broadcasts

A regression was introduced during refactoring where we used numUsers as
the size of the pending broadcasts. This caused some pending broadcasts
to be neglected.

Test: manually verified that SetUpWizard broadcasts were sent as
expected.
BUG: 233363816

Change-Id: I8f194f15971597593a9b022f2d5937cd519a30cb
1 file changed