Parse destination port from netlink message

Destination port will be used in subsequent changes to filter out
private dns tcp stat.
This change also correct expected port numbers to match with
real samples observed from netlink message.

Test: 1. atest TcpSocketTrackerTest
      2. Manual
Bug: 276230058
Change-Id: Ifa47bb318bdef2956518b533a4e90c6987bba134
2 files changed