Add wait time for screen state changed This is a flaky test in some poor perfomence device. We should wait more time for DeviceIdlenessTracker to receive SCREEN ON/OFF broadcast Bug:242271304 Test:run cts -m CtsJobSchedulerTestCases -t android.jobscheduler.cts.JobThrottlingTest#testRestrictingStopReason_RestrictedBucket Signed-off-by: duanyangqi <duanyangqi@xiaomi.com> Change-Id: Id307a602f14958341720197fe63616c7bbb62685