Adjust wait time for netlink socket test

The netlink_listener_test is a bit flaky since the massive sockets
closing process sometime take longer time then expected. Increase the
waiting time before checking the error message might help fixing this
problem.

Bug: 130205046
Test: netd_integration_test
Change-Id: I550e660261a9813563e87c1ce05a1f72bccfc26c