NetlinkListenerTest.TestSkDestroyError - deflake attempt

Hopefully this will get rid of:
  NetlinkListenerTest.TestSkDestroyError (netd_integration_test64) 01.462
  system/netd/tests/netlink_listener_test.cpp:136: Failure
  Expected: (0) < (rxErrorCount), actual: 0 vs 0

Which I've seen happen a number of times on TreeHugger
and in my own testing.

Test: builds, atest netd_unit_test netd_integration_test
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I2a709e065d936f558c8e5332de6ce0ad4236f953