Also add some toString() methods that were useful in debugging.
Test: new test in CSLocalAgentTests
Change-Id: Ife95815e39d92bbef84b1c5ea75a151882590d09
This doesn't do anything at this patchset, but the whole
pipe from the agent to ConnectivityService is built.
LocalNetworkInfo will be the name of the public information
sent in callbacks to clients.
Test: CSLocalAgentTests
Change-Id: I70e133031ef3b0aaf6c3e59ccc2ad895c66d339c