Generate better test failure output.

Change the way XfrmControllerTest asserts xfrm_address_t and
netdutils::Status values such that,
- mismatched addresses are printed in inet_ntop form, and
- status messages are printed for not-OK statuses.

Bug: 65495297
Test: runtest -x system/netd/server/netd_unit_test.cpp
Change-Id: I09c6320d1d4a8c92dee11aed451e3592388a951a
1 file changed