Espresso test for loopback video quality testing

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

Index: webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java
diff --git a/webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java b/webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java
index 72a449bb440e812671e3f6e29d7fbf08f8102165..5487fbabf8c3c82fc89c01240a331e735eda93da 100644
--- a/webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java
+++ b/webrtc/examples/androidapp/src/org/appspot/apprtc/AppRTCClient.java
@@ -27,10 +27,16 @@ public interface AppRTCClient {
     public final String roomUrl;
     public final String roomId;
     public final boolean loopback;
-    public RoomConnectionParameters(String roomUrl, String roomId, boolean loopback) {
+    public final String urlParameters;
+    public RoomConnectionParameters(
+        String roomUrl, String roomId, boolean loopback, String urlParameters) {
       this.roomUrl = roomUrl;
       this.roomId = roomId;
       this.loopback = loopback;
+      this.urlParameters = urlParameters;
+    }
+    public RoomConnectionParameters(String roomUrl, String roomId, boolean loopback) {
+      this(roomUrl, roomId, loopback, null /* urlParameters */);
     }
   }