test: ConnectivityService: Validate Route Add/Del

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)
1 file changed