Rename padding constants

These padding constants are generic to accessory views for
RadioButtonWithDescriptionLayout.  Renaming the constants will allow us
to introduce a new instance of that pattern without duplicating the
constants.

Bug: 1040146
Change-Id: Id177a044216535766e4df6e3396fdcc023026fab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2240455
Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Ben Schwartz <bemasc@chromium.org>
Auto-Submit: Ben Schwartz <bemasc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#777430}

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

@@ -52,8 +52,8 @@
         android:gravity="center_vertical"
         android:clickable="true"
         android:focusable="true"
-        android:paddingStart="@dimen/theme_preferences_checkbox_container_padding_start"
-        android:paddingEnd="@dimen/theme_preferences_checkbox_container_padding_end"
+        android:paddingStart="@dimen/radio_button_accessory_view_padding_start"
+        android:paddingEnd="@dimen/radio_button_accessory_view_padding_end"
         android:visibility="gone"
         android:background="?attr/selectableItemBackground">
 

chrome/android/java/res/values/dimens.xml

@@ -609,10 +609,12 @@
     <dimen name="navigation_sheet_content_wrap_padding">12dp</dimen>
     <dimen name="navigation_sheet_peek_height">120dp</dimen>
 
+    <!-- RadioButtonWithDescriptionLayout dimensions -->
+    <dimen name="radio_button_accessory_view_padding_start">60dp</dimen>
+    <dimen name="radio_button_accessory_view_padding_end">16dp</dimen>
+
     <!-- Appearance Settings dimensions -->
     <dimen name="theme_preferences_checkbox_margin_end">8dp</dimen>
-    <dimen name="theme_preferences_checkbox_container_padding_start">60dp</dimen>
-    <dimen name="theme_preferences_checkbox_container_padding_end">16dp</dimen>
     <dimen name="homepage_preference_title_lateral_padding">16dp</dimen>
     <dimen name="homepage_preference_title_vertical_padding">10dp</dimen>