Report app component used to all users for broadcasts

Previously, we were using the normal reportEvent even when the user id
was USER_ALL which had incorrect behavior.

This CL adds a method to UserStatsManagerInternal that allows the
broadcast reporting logic to use reportEventToAllUserId

Bug: 347644400
Test: atest UsageStatsServiceTest
Test: atest BroadcastQueueTest
Flag: EXEMPT bugfix
Change-Id: Ib1fa2c08c4427577f92d452f22cde6b4d122bb7d