Add tests for LinkProperties#EXCLUDED_ROUTES

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2063047

Change-Id: If3353de36549a1b879894b0a6a695abe6e6c7d07
Merged-In: Id353714331a19d09022d20f186c8f71343686da7
(cherry picked from commit aacf1ee88682c601d02764a485debafec5a4a0e7)
5 files changed