Make the Nat464Xlat tests more realistic.

464xlat will never be started on a network that is not connected,
or on a network that has no IPv6 address.

This is a no-op test-only change but it is necessary for an
upcoming change that violates some of the invalid assumptions
currently made by this test and causes it to fail.

Bug: 150648313
Test: test-only change
Change-Id: I41766e9adaa7c24454648b371e6e3cc647693be5
Merged-In: I41766e9adaa7c24454648b371e6e3cc647693be5
(cherry picked from commit df0c522d18ee73c1d20cff1a1dc955b383e6c355)
1 file changed
tree: be817c8f7fd472e6b1136e304a1694ad2200dbe7
  1. core/
  2. services/
  3. tests/