Refactor IpReachabilityMonitor#notifyLost callback by removing ip param.

Actually the caller(IpClient) of notifyLost doesn't use IP address param
at all, and also we should log the IP address in neighbor netlink event
when a neighbor is lost rather than the IP address iterated in the
watchlist. So refactor the callback signature by cleaning up the IP
address param.

Bug: 329009735
Test: atest NetworkStackTests
Change-Id: Ic80f3f28893bc3923d20e6a9d6c77261664510a9
3 files changed