power/stats: Rename readEnergyMeters to readEnergyMeter am: eef94f8f4f am: be9dcbc772

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1576534

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ic01acc804cef0f23aae190739c1be59710ffb0d4