Fix testSetDeliveryState_DeferUntilActive.

Previously, broadcast delivery to receivers within a
priority tranche are blocked until the delivery to
receivers in the previous tranche is completed. But
with com.android.server.am.limit_priority_scope flag
enabled, this is not the case anymore.

Bug: 371307720
Test: atest services/tests/mockingservicestests/src/com/android/server/am/BroadcastRecordTest.java
Flag: com.android.server.am.limit_priority_scope
Change-Id: I07fd402123b21b3a56e74aadb2281142442196d9