Fix progress and timeout dialog for getting account management policy

chrome/android/java/res/layout/signin_progress_bar_dialog.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright 2017 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="match_parent"
-    android:layout_height="wrap_content"
-    android:gravity="center_vertical">
+    android:gravity="center_vertical"
+    style="@style/AlertDialogContent">
 
     <ProgressBar
         android:layout_width="32dp"
         android:layout_height="32dp"
-        android:layout_marginTop="16dp"
-        android:layout_marginBottom="16dp"
-        android:layout_marginStart="16dp"
-        android:layout_marginEnd="8dp"
         android:indeterminate="true"/>
 
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:layout_marginBottom="16dp"
-        android:layout_marginStart="8dp"
-        android:layout_marginEnd="16dp"
+        android:layout_marginStart="16dp"
         android:text="@string/sign_in_getting_account_management_policy"
         android:textSize="16sp"/>
 </LinearLayout>