Merge "PowerLog: Update interface and tests for log plot" am: 8f07e9c178 am: 5e458bd45b

Original change: https://android-review.googlesource.com/c/platform/system/media/+/1627059

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ib5b7b34e2e989be81e283b34518e778b2669b0b7