Update Android Card Unmask prompt to rely on the controller a bit more.

ui/android/java/res/layout/autofill_card_unmask_prompt.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2014 The Chromium Authors. All rights reserved.
 
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file.
 -->
 
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:orientation="vertical">
 
     <TextView
+        android:id="@+id/card_unmask_instructions"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="@string/card_unmask_prompt_content_text"
         android:textSize="20sp"
         android:paddingStart="5dp"
         android:paddingEnd="5dp"
         android:paddingBottom="5dp"
         android:paddingTop="5dp"
         android:gravity="start"
         />
 
     <LinearLayout
         android:layout_width="match_parent"
@@ skipping 14 matching lines @@
         <TextView
             android:id="@+id/card_unmask_verification_message"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:gravity="start"
             android:visibility="gone"
             />
      </LinearLayout>
 
 </LinearLayout>