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/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()