Merge "ClatCoordinator: close tun fd if detect mtu failed" am: 0750626dd0 am: c457e23c54

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2109964

Change-Id: If0ed7055513d3fe52761a48751f91e213d75b173
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>