Merge "power/stats: Adding subsystem field to Channel" into sc-dev am: 6527c0e763 am: 8b32193271

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/13412798

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I8cce7ef12f10eddd2fda0fbcbb74377e1d0f830a