am bc026d0a: Fix NPE in ConnectivityService.

* commit 'bc026d0ad8457cf8a2cb66bd5ec06e11c035856f':
  Fix NPE in ConnectivityService.

services/java/com/android/server/ConnectivityService.java

@@ -1597,6 +1597,7 @@ private NetworkStateTracker makeWimaxStateTracker() {
                 if (checkType == prevNetType) continue;
                 if (mNetConfigs[checkType] == null) continue;
                 if (!mNetConfigs[checkType].isDefault()) continue;
+                if (mNetTrackers[checkType] == null) continue;
 
 // Enabling the isAvailable() optimization caused mobile to not get
 // selected if it was in the middle of error handling. Specifically