Implements a ping listener from XEP-0199 XMPP ping. In the future, we can send an XMPP ping to the server to check for the state of the connection.

syntax: glob
bin/*
R.java
doc/javadoc
src/com/beem/project/beem/service/aidl/*.java
gen/*
local.properties
**~
**/.*.sw?
.classpath