For #19693 - Add new string for the prompt to authenticate to use a stored credit card (#19708)

app/src/main/res/values/strings.xml

@@ -1567,6 +1567,8 @@
     <string name="credit_cards_warning_dialog_later">Later</string>
     <!-- Title of PIN verification dialog to direct users to re-enter their device credentials to access their credit cards -->
     <string name="credit_cards_biometric_prompt_message_pin">Unlock your device</string>
+    <!-- Message displayed in biometric prompt for authentication, before allowing users to use their stored credit card information -->
+    <string name="credit_cards_biometric_prompt_unlock_message">Unlock to use stored credit card information</string>
 
     <!-- Title of the Add search engine screen -->
     <string name="search_engine_add_custom_search_engine_title">Add search engine</string>