Validate route addition and deletion after linkProperties are changed. Bug: 142892223 Test: atest ConnectivityServiceTest#testStackedLinkProperties Change-Id: I18296b933e856a0f8a4c1dbd75bd35024853bfbb Merged-In: I18296b933e856a0f8a4c1dbd75bd35024853bfbb (cherry picked from commit a22a979a0caf3e3533ede410d48127084052aec5)