Update paint preview position

Bug: 1127577
Change-Id: I3885b31cf1cf8aaaee9a0817134b220b05687e54
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2407294Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Gang Wu <gangwu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806470}

chrome/android/java/res/menu/main_menu_regroup.xml

@@ -88,9 +88,6 @@
                 android:title="@null" />
           </menu>
         </item>
-        <item android:id="@+id/paint_preview_show_id"
-            android:title="@string/menu_paint_preview_show"
-            android:icon="@drawable/ic_photo_camera" />
         <item android:id="@+id/find_in_page_id"
             android:title="@string/menu_find_in_page"
             android:icon="@drawable/ic_find_in_page" />
@@ -114,6 +111,9 @@
                 android:checkable="true" />
           </menu>
         </item>
+        <item android:id="@+id/paint_preview_show_id"
+            android:title="@string/menu_paint_preview_show"
+            android:icon="@drawable/ic_photo_camera" />
         <item android:id="@+id/divider_line_id"
             android:title="@null" />
         <item android:id="@+id/reader_mode_prefs_id"