Only scan for wifi display when there is no active connections

Bug: 11717053
Change-Id: I4ab73f6517fbfb8fcc131b89d0e934380dcf69e0
diff --git a/media/java/android/media/MediaRouter.java b/media/java/android/media/MediaRouter.java
index 525dc4f..3f1851d 100644
--- a/media/java/android/media/MediaRouter.java
+++ b/media/java/android/media/MediaRouter.java
@@ -1343,12 +1343,6 @@
                 }
             }
         }
-
-        // Don't scan if we're already connected to a wifi display,
-        // the scanning process can cause a hiccup with some configurations.
-        if (wantScan && activeDisplay != null && sStatic.mCanConfigureWifiDisplays) {
-            sStatic.mDisplayService.scanWifiDisplays();
-        }
     }
 
     private static boolean shouldShowWifiDisplay(WifiDisplay d, WifiDisplay activeDisplay) {