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

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

Change-Id: I8c8ad71bc7b072652c3e62fbe3d6cff540ad681e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>