Prompt for unmasking Wallet credit card on Android

ui/android/java/strings/android_ui_strings.grd

Index: ui/android/java/strings/android_ui_strings.grd
diff --git a/ui/android/java/strings/android_ui_strings.grd b/ui/android/java/strings/android_ui_strings.grd
index c2a42a5eaedb74d3a982362e8726686f06f63831..41d94c1ccf2b4e68dde5fd54dc2a291a181e5401 100644
--- a/ui/android/java/strings/android_ui_strings.grd
+++ b/ui/android/java/strings/android_ui_strings.grd
@@ -216,6 +216,14 @@
       <message desc="Label for 'clear' button in date picker dialog and time picker dialog, used to replace the contents of a field with the empty string [CHAR-LIMIT=12]" name="IDS_DATE_PICKER_DIALOG_CLEAR">
         Clear
       </message>
+
+      <message desc="FIXME: write a description" name="IDS_INSTRUMENT_UNMASK_PROMPT_CONTENT_TEXT">
+        Enter the three digit verification code from the back of your card
+      </message>
+      <message desc="FIXME: write a description" name="IDS_INSTRUMENT_UNMASK_INPUT_HINT">
+        CVC
+      </message>
+
     </messages>
   </release>
 </grit>