IceSocketEndpoint: use isTCPEnabled for isReliable

Change-Id: Ie1338675efb16783a68a344da2a164632c0e088a

src/peer_connection.h

@@ -59,7 +59,7 @@ public:
     ~IceSocketEndpoint();
 
     void shutdown() override;
-    bool isReliable() const override { return ice_ ? ice_->isRunning() : false; }
+    bool isReliable() const override { return ice_ ? ice_->isTCPEnabled() : false; }
     bool isInitiator() const override { return ice_ ? ice_->isInitiator() : true; }
     int maxPayload() const override
     {