Improve tab switcher open perf

 Bug: 5379115

Change-Id: I5e5bfcfead4c54deb49af94de6f6526bd2710567
diff --git a/src/com/android/browser/NavScreen.java b/src/com/android/browser/NavScreen.java
index 1626183..45b1dcc 100644
--- a/src/com/android/browser/NavScreen.java
+++ b/src/com/android/browser/NavScreen.java
@@ -109,6 +109,10 @@
         }
     }
 
+    public void refreshAdapter() {
+        mAdapter.notifyDataSetChanged();
+    }
+
     private void init() {
         LayoutInflater.from(mContext).inflate(R.layout.nav_screen, this);
         setContentDescription(mContext.getResources().getString(