[CLATJ#15] ClatCoordinator: add socket filter to packet socket

Update our packet socket filter to reflect the new 464xlat IP address

Bug: 212345928
Test: flash and boot
Run "atest ClatCoordinatorTest" in a followup commit

Change-Id: Ic50dc122731f311ad00ab8bff5472cb3bc41f5f1
2 files changed