Associate screenshots with original url.

Partial fix for http://b/issue?id=1949260 : can't get a thumb for
facebook.com.  Associate the screenshot with the original url so
a bookmark that was redirected will still get updated with the
picture.
diff --git a/src/com/android/browser/BrowserActivity.java b/src/com/android/browser/BrowserActivity.java
index b28d892..e65e8e1 100644
--- a/src/com/android/browser/BrowserActivity.java
+++ b/src/com/android/browser/BrowserActivity.java
@@ -2978,12 +2978,13 @@
 
             // If this is a bookmarked site, add a screenshot to the database.
             // FIXME: When should we update?  Every time?
-            if (url != null) {
+            String original = view.getOriginalUrl();
+            if (original != null) {
                 // copied from BrowserBookmarksAdapter
-                int query = url.indexOf('?');
-                String noQuery = url;
+                int query = original.indexOf('?');
+                String noQuery = original;
                 if (query != -1) {
-                    noQuery = url.substring(0, query);
+                    noQuery = original.substring(0, query);
                 }
                 String URL = noQuery + '?';
                 String[] selArgs = new String[] { noQuery, URL };