ClatCoordinator: only dump information when clat is started

ClatCoordinator should not rely on the caller Nat464Xlat to
avoid dumping when clat is not started. It is safer to dump
information after ClatCoordinator has checked its status.
Only dumping ClatCoordinator with clatd started reduces the null
pointer check of dumped elements as well.

Test: atest ClatCoordinatorTest
Change-Id: Ia0be9a593cd75fd34f647230d642b0dcf84aaf3b
3 files changed