Revert "Revert "Take all VPN underlying networks into account when migrating traffic for""

This reverts commit d8220c20.

Reason for revert: Fix available for deadlocks.

Bug: 113122541
Bug: 134244752
Merged-In: Ib65214598837289bd39dbf040b56ab7835f893ba
Change-Id: Ia90bf2c72ef686e80800d113d03548e0efcadb66
(cherry picked from commit a84d9fa5)