Drop packets to VPN address ingressing via non-VPN interface am: d493a3aa7d am: e1a122fa30

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/28724994

Change-Id: Ida612be17b0bde29a6697b24496c057d1c2aae4f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>