Fix phone account settings translations

Use phone_accounts instead of phone_account_settings; the strings were
identical but for some reason we only had translations for the former.

Bug:18057447
Change-Id: I873c0677f94355f9f10c72e820a6c313e51d92cc
diff --git a/res/xml/call_feature_setting.xml b/res/xml/call_feature_setting.xml
index 6dedd1d..2148594 100644
--- a/res/xml/call_feature_setting.xml
+++ b/res/xml/call_feature_setting.xml
@@ -19,7 +19,7 @@
 
     <PreferenceScreen
         android:key="phone_account_settings_preference_screen"
-        android:title="@string/phone_account_settings">
+        android:title="@string/phone_accounts">
 
         <intent
             android:targetPackage="com.android.phone"