Lengthen CHAR LIMIT of settings_system_default

Bug: 9495443
Change-Id: Ib52d0ab357e79ae6004411f4b4201570a228bc71
diff --git a/java/res/values/strings.xml b/java/res/values/strings.xml
index cdc2c3a..f24b433 100644
--- a/java/res/values/strings.xml
+++ b/java/res/values/strings.xml
@@ -79,7 +79,7 @@
 
     <!-- Units abbreviation for the duration (milliseconds) [CHAR LIMIT=10] -->
     <string name="abbreviation_unit_milliseconds"><xliff:g id="milliseconds">%s</xliff:g>ms</string>
-    <!-- The text that represents the current settings value is the system default [CHAR LIMIT=20] -->
+    <!-- The text that represents the current settings value is the system default [CHAR LIMIT=25] -->
     <string name="settings_system_default">System default</string>
 
     <!-- Option name for enabling or disabling the use of names of people in Contacts for suggestion and correction [CHAR LIMIT=25] -->