update description for string transaltion for IT-CMAS requirement

Bug: 159062066
Test: Build
Change-Id: I14945535145721c3d035113c3fcba3222fc614b3
diff --git a/res/values-mcc222/strings.xml b/res/values-mcc222/strings.xml
index 0e1f475..d270735 100644
--- a/res/values-mcc222/strings.xml
+++ b/res/values-mcc222/strings.xml
@@ -14,6 +14,8 @@
      limitations under the License.
 -->
 <resources xmlns:android="http://schemas.android.com/apk/res/android" xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
-    <!-- Cell Broadcast settings title.  [CHAR LIMIT=50] -->
+    <!-- Cell Broadcast settings title.  [CHAR LIMIT=50]
+         This settings will be shown on devices with Italian SIMs.
+         Required Italian (it) translation for this message: "Allarmi Pubblici" -->
     <string name="cell_broadcast_settings">Public warnings</string>
 </resources>
\ No newline at end of file