Revert "Block incoming non-VPN packets to apps under fully-routed VPN"

This reverts commit fd8f96d71925cc80f5052365af2e5150cc0ec3ca.
This change does not have any topic: not reverting the other 2 commits in the original topic.

Reason for revert: broke FrameworksNetTests presubmit: b/130397860

Change-Id: Iff41d9fe97fafea44680c8d67d1ce19277548cc0
8 files changed