ClatCoordinator: fix erroneous .close() of fds without throw am: 7e8bea3cf9 am: 7c8084c14b am: 7ee54eb694

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2121915

Change-Id: If01ff123a65a1e8fae158aaf3b62926aea31ed3e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>