fix(android): avoid to crash the app closing the InAppBrowser (apache#1018)

Author: Makiwin

src/android/InAppBrowser.java

@@ -536,7 +536,11 @@ public void run() {
                     // NB: wait for about:blank before dismissing
                     public void onPageFinished(WebView view, String url) {
                         if (dialog != null && !cordova.getActivity().isFinishing()) {
-                            dialog.dismiss();
+                            try {
+                                dialog.dismiss();
+                            } catch(IllegalArgumentException e) {
+                                LOG.e(LOG_TAG, "Caught exception when trying to close IAB dialog: " + e);
+                            }    
                             dialog = null;
                         }
                     }