Send the new UID along with ACTION_PACKAGE_REMOVED broadcast

Follow up of ag/16417696

Pass the new UID in the broadcast via a new Intent extra with the name
Intent.EXTRA_NEW_UID. This is necessary for many system components to
migrate data structures linked with the old UID to the new one.

Test: SharedUserMigrationTest#testDataMigration
Bug: 217762162
Change-Id: I24f6707cf0fa0ed5acf6836cb803ce96df6f78fc