Correct portIdToPath for TV

There is no portInfo for TV itself (Physical address 0.0.0.0 with
port 0) and would cause system get invalid path for command <Routing
Change>.

Bug: b/309904148

Change-Id: Icd7099e8afbc588eee8e7b27fb6fcfb914d7d032

services/core/java/com/android/server/hdmi/HdmiCecNetwork.java

@@ -899,6 +899,9 @@ public class HdmiCecNetwork {
      * port id.
      */
     int portIdToPath(int portId) {
+        if (portId == Constants.CEC_SWITCH_HOME) {
+            return getPhysicalAddress();
+        }
         HdmiPortInfo portInfo = getPortInfo(portId);
         if (portInfo == null) {
             Slog.e(TAG, "Cannot find the port info: " + portId);