Don't reference framework strings.

Bug: 27513548
Change-Id: Ia459d540ebcb81c8a6d6b045e71141aef849d1f1
diff --git a/res/values/strings.xml b/res/values/strings.xml
index cf8eed9..6a1ab9c 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -5870,7 +5870,7 @@
     <string name="emergency_tone_vibrate">Vibrate</string>
 
     <!-- Sound: Title for the Do not Disturb option and associated settings page. [CHAR LIMIT=30] -->
-    <string name="zen_mode_settings_title" translatable="false">@*android:string/zen_mode_feature_name</string>
+    <string name="zen_mode_settings_title" translatable="false">Do not disturb</string>
 
     <!-- Do not disturb: Title for the Priority interruptions option and associated settings page. [CHAR LIMIT=30] -->
     <string name="zen_mode_priority_settings_title">Priority only allows</string>