Fix NPE caused by NetworkManager sending update before JS is ready.

This was happening for me when the device has been sleeping long
enough to turn its networking off, and I start an app via adb.

framework/src/org/apache/cordova/NativeToJsMessageQueue.java

@@ -219,6 +219,10 @@ public void addJavaScript(String statement) {
      * Add a JavaScript statement to the list.
      */
     public void addPluginResult(PluginResult result, String callbackId) {
+        if (callbackId == null) {
+            Log.e(LOG_TAG, "Got plugin result with no callbackId", new Throwable());
+            return;
+        }
         // Don't send anything if there is no result and there is no need to
         // clear the callbacks.
         boolean noResult = result.getStatus() == PluginResult.Status.NO_RESULT.ordinal();

framework/src/org/apache/cordova/NetworkManager.java

@@ -206,9 +206,11 @@ private String getConnectionInfo(NetworkInfo info) {
      * @param connection the network info to set as navigator.connection
      */
     private void sendUpdate(String type) {
-        PluginResult result = new PluginResult(PluginResult.Status.OK, type);
-        result.setKeepCallback(true);
-        this.success(result, this.connectionCallbackId);
+        if (connectionCallbackId != null) {
+            PluginResult result = new PluginResult(PluginResult.Status.OK, type);
+            result.setKeepCallback(true);
+            this.success(result, this.connectionCallbackId);
+        }
 
         webView.postMessage("networkconnection", type);
     }