Fix prefetch test.

Confirm that the PrefetchController has processed the launch time change
and scheduled an alarm before checking that the JobStatus has been
updated.

Bug: 215215283
Test: atest --rerun-until-failure 50 FrameworksMockingServicesTests:PrefetchControllerTest
Change-Id: I99a3298e6ae05819e7da18b9658e71969e8f9647

services/tests/mockingservicestests/src/com/android/server/job/controllers/PrefetchControllerTest.java

@@ -383,6 +383,10 @@ public class PrefetchControllerTest {
 
         inOrder.verify(mUsageStatsManagerInternal, timeout(DEFAULT_WAIT_MS).times(0))
                 .getEstimatedPackageLaunchTime(SOURCE_PACKAGE, SOURCE_USER_ID);
+        verify(mAlarmManager, timeout(DEFAULT_WAIT_MS).times(1))
+                .setWindow(
+                        anyInt(), eq(sElapsedRealtimeClock.millis() + 3 * HOUR_IN_MILLIS),
+                        anyLong(), eq(TAG_PREFETCH), any(), any());
         assertFalse(jobStatus.isConstraintSatisfied(JobStatus.CONSTRAINT_PREFETCH));
     }