Merge "power/stats: Correct language surrounding timestamps" am: 75d7e5de7c am: f2d5702776 am: 1aaf18b6f2

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1703725

Change-Id: Id55555fa6d71fdd8fc177d156c479090252e47b0