Fix failing testSlicedStateCountMetricNoReset am: 0a824b9a90 am: fdc54181eb am: 22aec082d9 am: a5600026af

Original change: https://android-review.googlesource.com/c/platform/packages/modules/StatsD/+/2393675

Change-Id: If53f0d6697f562bd9d97274234b6edc98e24d970
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>