Fix a mdns coverity issue to avoid RESOURCE_LEAK

Bug: 312268760

[Description]
sock not close before return if addr type is not ipv4 or ipv6.
This will cause a RESOURCE_LEAK coverity issue.

[Solution]
close open socket before return

Change-Id: I81dbb8663cd10169cbf106846eb1a0b4318ee050
Signed-off-by: jiangpingping <jiangpingping@xiaomi.com>