libhealthloop: Make the filterPowerSupplyEvents unit test easier to maintain am: b8e15ebaa8 am: 7a3762cbdd

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3252944

Change-Id: I396e65546123cc53b9a96f8141e412692e05a629
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>