Update string char limit

Change-Id: I79bd24ba548cd2b9f37d11f30af3076cdc394412
Fix: 35449637
Test: builds
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 7cd9ae4..924e9fd 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -6166,7 +6166,7 @@
     <!-- Sound: Other sounds: Title for the option enabling boot sounds. [CHAR LIMIT=30] -->
     <string name="boot_sounds_title">Power on sounds</string>
 
-    <!-- Sound: Title for the Do not Disturb option and associated settings page. [CHAR LIMIT=30] -->
+    <!-- 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>
 
     <!-- Do not disturb: Title for the Priority interruptions option and associated settings page. [CHAR LIMIT=30] -->