Properly send URL parameters in all requests

https://codereview.webrtc.org/2825313002/
added this only to connection URL but it's needed everywhere

BUG=webrtc:7548

Review-Url: https://codereview.webrtc.org/2858493003
Cr-Commit-Position: refs/heads/master@{#17981}

webrtc/examples/androidapp/src/org/appspot/apprtc/WebSocketRTCClient.java

@@ -131,23 +131,28 @@ public class WebSocketRTCClient implements AppRTCClient, WebSocketChannelEvents
 
   // Helper functions to get connection, post message and leave message URLs
   private String getConnectionUrl(RoomConnectionParameters connectionParameters) {
-    String url = connectionParameters.roomUrl + "/" + ROOM_JOIN + "/" + connectionParameters.roomId;
-    if (connectionParameters.urlParameters != null) {
-      url += "?" + connectionParameters.urlParameters;
-    }
-    return url;
+    return connectionParameters.roomUrl + "/" + ROOM_JOIN + "/" + connectionParameters.roomId
+        + getQueryString(connectionParameters);
   }
 
   private String getMessageUrl(
       RoomConnectionParameters connectionParameters, SignalingParameters signalingParameters) {
     return connectionParameters.roomUrl + "/" + ROOM_MESSAGE + "/" + connectionParameters.roomId
-        + "/" + signalingParameters.clientId;
+        + "/" + signalingParameters.clientId + getQueryString(connectionParameters);
   }
 
   private String getLeaveUrl(
       RoomConnectionParameters connectionParameters, SignalingParameters signalingParameters) {
     return connectionParameters.roomUrl + "/" + ROOM_LEAVE + "/" + connectionParameters.roomId + "/"
-        + signalingParameters.clientId;
+        + signalingParameters.clientId + getQueryString(connectionParameters);
+  }
+
+  private String getQueryString(RoomConnectionParameters connectionParameters) {
+    if (connectionParameters.urlParameters != null) {
+      return "?" + connectionParameters.urlParameters;
+    } else {
+      return "";
+    }
   }
 
   // Callback issued when room parameters are extracted. Runs on local

webrtc/examples/androidtests/video_quality_loopback_test.py

@@ -85,10 +85,6 @@ def _ParseArgs():
 
 
 def main():
-  # Disabled, see bugs.webrtc.org/7548
-  if True:
-    return 0
-
   logging.basicConfig(level=logging.INFO)
 
   args = _ParseArgs()