am 9991017b: Only leave one default network up at a time.

* commit '9991017bbd026080695fc33198609be7bfd4f9be':
  Only leave one default network up at a time.
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index 4145854..a64ceb9 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -1297,6 +1297,7 @@
                             " teardown");
                     if (!teardown(otherNet)) {
                         Slog.e(TAG, "Network declined teardown request");
+                        teardown(thisNet);
                         return;
                     }
                     if (isFailover) {