Merge "TrafficController - trivialize dump()" into main am: a5af3e3e5e

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2717698

Change-Id: Ie437ff95e90258a7153ab42f372021f5cb84efc0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>