Add CVC icon to card unmasking prompt

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

Index: ui/android/java/res/layout/autofill_card_unmask_prompt.xml
diff --git a/ui/android/java/res/layout/autofill_card_unmask_prompt.xml b/ui/android/java/res/layout/autofill_card_unmask_prompt.xml
deleted file mode 100644
index 360e2169200b159454ba77d8781667111c0bfb9b..0000000000000000000000000000000000000000
--- a/ui/android/java/res/layout/autofill_card_unmask_prompt.xml
+++ /dev/null
@@ -1,79 +0,0 @@
-<?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/instructions"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:textSize="16sp"
-        android:layout_marginStart="24dp"
-        android:layout_marginEnd="10dp"
-        android:layout_marginBottom="8dp"
-        android:layout_marginTop="10dp"
-        android:gravity="start" />
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:orientation="horizontal">
-
-        <!-- TODO(estade): add accessibility content descriptions. -->
-        <Spinner
-            android:id="@+id/expiration_month"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginStart="16dp"
-            android:visibility="gone" />
-
-        <Spinner
-            android:id="@+id/expiration_year"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_marginStart="16dp"
-            android:visibility="gone" />
-
-        <EditText
-            android:id="@+id/card_unmask_input"
-            android:inputType="number"
-            android:layout_height="wrap_content"
-            android:layout_width="wrap_content"
-            android:layout_marginStart="16dp"
-            android:layout_marginEnd="16dp"
-            android:ems="4"
-            android:hint="@string/card_unmask_input_hint" />
-
-        <ProgressBar
-            style="@android:style/Widget.ProgressBar.Small"
-            android:id="@+id/verification_progress_bar"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center_vertical"
-            android:visibility="gone" />
-
-        <ImageView
-            android:id="@+id/verification_success"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:src="@drawable/verify_checkmark"
-            android:layout_gravity="center_vertical"
-            android:visibility="gone" />
-
-        <TextView
-            android:id="@+id/verification_message"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="center_vertical"
-            android:gravity="start"
-            android:visibility="gone" />
-     </LinearLayout>
-
-</LinearLayout>