Don't cache default state when adding pending contact.

This can overwrite the initial state broadcast by the
rendezvous poller.

bramble-core/src/main/java/org/briarproject/bramble/contact/ContactManagerImpl.java

@@ -147,7 +147,6 @@ class ContactManagerImpl implements ContactManager, EventListener {
 		} finally {
 			db.endTransaction(txn);
 		}
-		states.put(p.getId(), WAITING_FOR_CONNECTION);
 		return p;
 	}