libnetd_resolv: Error path unit test for android_getaddrinfofornetcontext

Note: The following test case is blocked by aosp/816674 which causes
      wrong error code EAI_FAIL (4) but EAI_NODATA (7). Remove it temporarily.

      GetAddrInfoForNetContextTest.AlphabeticalHostname_NoData

Test: built, flashed, booted
      system/netd/tests/runtests.sh passes

Change-Id: I4dd8d279fc404f60de823855a0059797805ef911