power/stats: Rename PowerStats HAL am: 18a3fb5ce3 am: 54ef8247d8

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1576527

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I4e89a85924a9ed6bc6e22411751374f6904efbde