Avoid calling noteOp while enqueueing the broadcast.

Enqueueing the broadcast involves adding the broadcast
to the internal state to be delivered at a later point.
Since the broadcast is not actually delivered at this
point, avoid calling noteOp.

Bug: 268016162
Test: atest services/tests/mockingservicestests/src/com/android/server/am/BaseBroadcastQueueTest.java
Test: atest services/tests/mockingservicestests/src/com/android/server/am/BroadcastQueueTest.java
Test: atest services/tests/mockingservicestests/src/com/android/server/am/BroadcastSkipPolicyTest.java
Flag: com.android.server.am.avoid_note_op_at_enqueue
Change-Id: I446b4eac8b1912c4acd6baf86240aa308bdb29c0