Add setting for default editor account (1/2).

In setting section, add "Default account" to let user
set which is default account to edit a new contact from
the account lists.

BUG 21932040

Change-Id: I6312da6f9738229da4bd7f11daf8cfd7b587e00f
diff --git a/res-common/values/strings.xml b/res-common/values/strings.xml
index e3fc643..c0fa03e 100644
--- a/res-common/values/strings.xml
+++ b/res-common/values/strings.xml
@@ -656,6 +656,9 @@
     <!-- An allowable value for the "view names as" contact display option  -->
     <string name="display_options_view_family_name_first">Last name first</string>
 
+    <!--Label of the "default account" setting option to set default editor account-->
+    <string name="default_editor_account">Default account</string>
+
     <!-- Action that shares visible contacts -->
     <string name="share_visible_contacts">Share visible contacts</string>