Revert "Take all VPN underlying networks into account when migrating traffic for" This reverts commit ee48ac4abd56e00836234be0556ef4437168bf4b. Reason for revert: This change has been implicated in 4-way deadlocks as seen in b/134244752. Bug: 134244752 Change-Id: Ibdaad3a4cbf0d8ef1ed53cfab1e454b9b878bae9