Enable auto text encoding

Set locale specific text encoding for Chinese, Japanese,
Korean and keep "UTF-8" encoding as default for all other
locales.

Add "Auto detect" (localized for Chinese only) as additional
list item for "Text Encoding" list preference.

Change-Id: Ic33287f6999e2741dce57eb3fb7adc66f3fb0b9f
diff --git a/res/values-ja/strings.xml b/res/values-ja/strings.xml
index 4fff052..af5280f 100644
--- a/res/values-ja/strings.xml
+++ b/res/values-ja/strings.xml
@@ -259,7 +259,9 @@
     <item msgid="5589150448475151241">"日本語(SHIFT_JIS)"</item>
     <item msgid="7356792686950371843">"日本語(EUC-JP)"</item>
     <item msgid="2193955365569270096">"韓国語(EUC-KR)"</item>
+    <item>@string/pref_default_text_encoding_default_value</item>
   </string-array>
+    <string name="pref_default_text_encoding_default">SHIFT_JIS</string>
     <string name="pref_default_text_encoding_dialogtitle" msgid="5508255018084978547">"テキストエンコード"</string>
     <string name="pref_accessibility_title" msgid="5127836981587423215">"ユーザー補助"</string>
     <string name="pref_font_size_category" msgid="6683754355084218254">"文字サイズ"</string>