Fix tests that fail because tracing is unavailable (as opposed to off).

For example: https://sponge.corp.google.com/target?show=FAILED&sortBy=STATUS&id=fb8d4407-8cb5-4911-bbe0-e0ddb5a5ece0&target=x86+CtsStatsdHostTestCases

Bug: 152120517
Test: atest CtsStatsdHostTestCases:android.cts.statsd.alert.AnomalyDetectionTests#testCountAnomalyDetection
Change-Id: I97b5b93000fe71815b4e3f5e452824458a47d14c
1 file changed