Merge "Report sparse per-iface stats using atrace." into main am: ac871ada08 am: b4a589d64d

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2802441

Change-Id: I7ed809d565acf86e9aa4a48ede724fe32131bee5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>