Messaging: Notification channel string fixes

* Convert AOSP translations for renamed string
* Move new string so we can translate it

Change-Id: I4da7137e77f8a88196c94b2b98107ead1efabd65
diff --git a/res/values-ja/strings.xml b/res/values-ja/strings.xml
index a3a513e..ee8e994 100644
--- a/res/values-ja/strings.xml
+++ b/res/values-ja/strings.xml
@@ -258,7 +258,7 @@
     <string name="mms_messaging_category_pref_title" msgid="4816815152658525660">"MMS"</string>
     <string name="advanced_category_pref_title" msgid="6411454224069259687">"詳細設定"</string>
     <string name="debug_category_pref_title" msgid="8765138968242505061">"デバッグ"</string>
-    <string name="notifications_enabled_pref_title" msgid="4127288731844373795">"通知"</string>
+    <string name="notifications_pref_title" msgid="4127288731844373795">"通知"</string>
     <string name="notification_sound_pref_title" msgid="3685506528957337849">"通知音"</string>
     <string name="silent_ringtone" msgid="8073534180322059814">"マナーモード"</string>
     <string name="notification_vibrate_pref_title" msgid="6668564570045187390">"バイブレーション"</string>