Hiding search bar buttons when qsb is disabled. (5187969, 5201453)

Change-Id: I23cbfac5c1a8f96eb8158fd30a1fb335b044d49c
diff --git a/src/com/android/launcher2/LauncherApplication.java b/src/com/android/launcher2/LauncherApplication.java
index 9b24587..ba028ef 100644
--- a/src/com/android/launcher2/LauncherApplication.java
+++ b/src/com/android/launcher2/LauncherApplication.java
@@ -62,6 +62,9 @@
         filter = new IntentFilter();
         filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
         registerReceiver(mModel, filter);
+        filter = new IntentFilter();
+        filter.addAction(SearchManager.INTENT_ACTION_SEARCHABLES_CHANGED);
+        registerReceiver(mModel, filter);
 
         // Register for changes to the favorites
         ContentResolver resolver = getContentResolver();