Fix failing testSlicedStateCountMetricNoReset am: 0a824b9a90 am: fdc54181eb

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

Change-Id: Ic3ca759f216abd2b60379b38dcf1ac1d97c38583
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>