This change forces Socket and DatagramSocket to populate the SocketImpl, ensuring that the socket file descriptor can be retrieved when applying Transport mode Transforms This is done by calling getSoLinger(), triggering a getImpl(), which triggers setImpl() if needed. Bug: 77491294 Test: Added tests in IpSecManagerTest, ran on walleye Change-Id: I40da08b031357710eb794e0f866aec5660c79594