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

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

Change-Id: I07add2a007a2f68820948f6070a0c345b67127fe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>