Revert "Fix network leaks with split-tunnel VPNs"

This reverts commit 70cc90b9.

Reason for revert: Causes random reboots without further thread-safety alterations to the patch it was applied on top of, *and* does not fully resolve the problems it intends to (further work needed)

Change-Id: Ia8ba3f12042745d04457cc5581edbc5d38e6154b