Merge "Add experiment flag for tethering refactor" into main am: dbae5744

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2858906



Change-Id: I79655805f468cc1cfe0345a7416689f0151d3a3b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>