When subscribing for network connectivity broadcasts, also query the …

…value so we always have the most up-to-date value.

Summary:
We've seen cases (based on logs) where NetInfo is reporting no connectivity, but network requests still work. This will keep status up to date after app foreground <-> backgrounds, since we don't listen to broadcasts when backgrounded.

This is rather difficult to test given we haven't nailed an internal repro (evidence is solely based on device/app logs).  Testing has been done to ensure that there are no behavioural changes on devices that were previously working (no regressions).
Closes facebook#15558

Differential Revision: D6264708

Pulled By: hramos

fbshipit-source-id: 1648cadb59949103d0a595614b38024ec9236719

NetInfoModule.java

@@ -124,6 +124,7 @@ private void registerReceiver() {
     filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
     getReactApplicationContext().registerReceiver(mConnectivityBroadcastReceiver, filter);
     mConnectivityBroadcastReceiver.setRegistered(true);
+    updateAndSendConnectionType();
   }
 
   private void unregisterReceiver() {