Update the search widget icon if the global search provider changes.

Note that this change is necessary because the launcher might
receive the PM broadcast before the SearchManagerService does.

Change-Id: I5a03e2fb16dee232a83d24b834ef6bd0eaabe774
diff --git a/src/com/android/launcher2/LauncherApplication.java b/src/com/android/launcher2/LauncherApplication.java
index db3a4cb..94163ac 100644
--- a/src/com/android/launcher2/LauncherApplication.java
+++ b/src/com/android/launcher2/LauncherApplication.java
@@ -17,6 +17,7 @@
 package com.android.launcher2;
 
 import android.app.Application;
+import android.app.SearchManager;
 import android.content.ContentResolver;
 import android.content.Intent;
 import android.content.IntentFilter;
@@ -57,6 +58,9 @@
         filter.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE);
         filter.addAction(Intent.ACTION_LOCALE_CHANGED);
         registerReceiver(mModel, filter);
+        filter = new IntentFilter();
+        filter.addAction(SearchManager.INTENT_GLOBAL_SEARCH_ACTIVITY_CHANGED);
+        registerReceiver(mModel, filter);
 
         // Register for changes to the favorites
         ContentResolver resolver = getContentResolver();