Synchronize Contacts on connected

Summary

Move the request to synchronize contacts to the connected() method so that the packet doesn't get lost

This is tricky to test, but it seems more reliable than before

Test Plan

Before:

Sometimes when the desktop and the phone were connected the contacts would not get synchronized

After:

After a few tries, I saw the message that the contacts were synchronized 100% of the time, so at least things don't seem to be any worse!