Fix the last lint warnings in chrome/

chrome/android/java/res/layout/autofill_credit_card_editor.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. -->
 
 <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:fillViewport="true"
     android:scrollbarStyle="outsideOverlay" >
 
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical" >
 
+        <!-- EditText views in FloatLabelLayout require both hint and contentDescription to be set
+             to work correctly for accessibility because FloatLabelLayout sometimes clear hint. -->
+        <!--suppress ContentDescription -->
         <LinearLayout
             style="@style/PreferenceScreenLayout"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="vertical"
             android:focusableInTouchMode="true"
             android:paddingTop="6dp" >
 
             <org.chromium.chrome.browser.widget.FloatLabelLayout
                 android:id="@+id/credit_card_name_label"
@@ skipping 32 matching lines @@
                 android:textAppearance="@style/PreferenceFloatLabelTextAppearance"
                 android:text="@string/autofill_credit_card_editor_expiration_date"
                 android:paddingStart="@dimen/pref_autofill_field_horizontal_padding"
                 android:paddingEnd="@dimen/pref_autofill_field_horizontal_padding" />
 
             <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:orientation="horizontal"
                 android:paddingTop="8dp"
+                android:baselineAligned="false"
                 android:layout_marginStart="@dimen/pref_autofill_field_horizontal_padding"
                 android:layout_marginEnd="@dimen/pref_autofill_field_horizontal_padding" >
 
                 <LinearLayout
                     android:layout_width="0dp"
                     android:layout_height="wrap_content"
                     android:layout_weight="1"
                     android:orientation="vertical"
                     android:paddingEnd="10dp" >
                     <Spinner
@@ skipping 32 matching lines @@
                 android:text="@string/cancel" />
 
             <Button
                 android:id="@+id/autofill_credit_card_save"
                 style="@style/ButtonBarButton"
                 android:text="@string/save" />
         </LinearLayout>
     </LinearLayout>
 
 </ScrollView>