Add a profiler to SSTConnectionManager since its the only PollingService and is on the main strand.  It seems to occupy a large fraction of the processing time in ping tests.
Add a profiler to SSTConnectionManager since its the only PollingService and is on the main strand.  It seems to occupy a large fraction of the processing time in ping tests.

sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata,sirikata/sirikata