Browser: add to support search engine preset

1. Set Baidu search engine as the default search engine.
2. Add 139 search engine for carrier.

CRs-fixed: 507955

Change-Id: Idccc86f2d9ac439dcfff5f65e853bb4618fed361
diff --git a/res/values-zh-rCN/donottranslate-search_engines.xml b/res/values-zh-rCN/donottranslate-search_engines.xml
index c38055c..b85a2b5 100644
--- a/res/values-zh-rCN/donottranslate-search_engines.xml
+++ b/res/values-zh-rCN/donottranslate-search_engines.xml
@@ -23,8 +23,10 @@
 <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
   <string-array name="search_engines" translatable="false">
     <item>google</item>
-    <item>baidu</item>
+    <item>baidu_cn</item>
+    <item>cmcc_cn</item>
     <item>yahoo_cn</item>
     <item>bing_zh_CN</item>
   </string-array>
+  <string name="default_search_engine_value">baidu_cn</string>
 </resources>