Update string for Do not disturb preference.

Bug: 34975939
Test: builds
Change-Id: I4567b9133deae1c52741d6f0d48d95be642bf2d2
diff --git a/res/values/strings.xml b/res/values/strings.xml
index d37d9d9..5399181 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -6230,7 +6230,16 @@
     <string name="boot_sounds_title">Power on sounds</string>
 
     <!-- Sound: Title for the Do not Disturb option and associated settings page. [CHAR LIMIT=50]-->
-    <string name="zen_mode_settings_title">Do not disturb preferences</string>
+    <string name="zen_mode_settings_title">Do Not Disturb preferences</string>
+
+    <!-- Sound: Summary for the Do not Disturb option when there is no automatic rules turned on. [CHAR LIMIT=NONE]-->
+    <string name="zen_mode_settings_summary_off">No automatic rules turned on</string>
+
+    <!-- Sound: Summary for the Do not Disturb option when at least one automatic rules turned on. [CHAR LIMIT=NONE]-->
+    <plurals name="zen_mode_settings_summary_on">
+        <item quantity="one">1 automatic rule turned on</item>
+        <item quantity="other"><xliff:g id="on_count" example="10">%d</xliff:g> automatic rules turned on</item>
+    </plurals>
 
     <!-- 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>