Merge "Remove unused functions in TrafficController" am: ea95231d63

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2128997

Change-Id: I7698bbe69b1562960fcac3ef12fe24ef7c26c74a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>