Adds Westworld logging of RescueParty reset events.

Adds the RescuePartyResetReported Atom, and uses it in RescueParty.java
to log when a reset is done.
Also adds a small test program that can be built and run manually in
order to test the flow of new log events.

Test: Ran the test program and verified that the events flow through a
local statsd.

Change-Id: I0202dd8c00441d0544aed7de1d6027160b4d9a2b
Bug: 121121998