Default to Google if global search provider not present.

Bug: 3009486
Change-Id: I9d727b5f6d478483814e420aca7ad30dcf5252f5
diff --git a/src/com/android/browser/BrowserSettings.java b/src/com/android/browser/BrowserSettings.java
index 92b4cac..a51c773 100644
--- a/src/com/android/browser/BrowserSettings.java
+++ b/src/com/android/browser/BrowserSettings.java
@@ -302,7 +302,8 @@
 
         homeUrl =
             p.getString(PREF_HOMEPAGE, homeUrl);
-        String searchEngineName = p.getString(PREF_SEARCH_ENGINE, null);
+        String searchEngineName = p.getString(PREF_SEARCH_ENGINE,
+                SearchEngine.GOOGLE);
         if (searchEngine == null || !searchEngine.getName().equals(searchEngineName)) {
             if (searchEngine != null) {
                 if (searchEngine.supportsVoiceSearch()) {