Move XfrmControllerTest from integration to unit.

Bug: 65495297
Test: runtest -x system/netd/server/netd_unit_test.cpp
Test: runtest -x system/netd/tests/netd_integration_test.cpp
Change-Id: I56d22c7565ff56b7c0e948e49009e63ebb7995c1
2 files changed