🏠 Add expand button and flag to enable it

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- android_chrome_strings.grd contains strings for Chrome for Android.
 
 FAQ:
   - How do I add, change, or remove a string?
       Just update this file.
   - Translations will happen automatically??
       Yes, indeed. Just add your string before the branch point and
       make the description good.
@@ skipping 2516 matching lines @@
       </message>
       <message name="IDS_ACCESSIBILITY_TOOLBAR_BTN_TABSWITCHER_TOGGLE" desc="Content description for the button that enters or leaves the tab switcher. [ICU Syntax]">
         {OPEN_TABS, plural, =1 {%1$d open tab} other {%1$d open tabs}}
       </message>
       <message name="IDS_ACCESSIBILITY_TOOLBAR_BTN_TABSWITCHER_TOGGLE_DEFAULT" desc="Placeholder content description for the button that enters or leaves the tab switcher.">
         open tabs
       </message>
       <message name="IDS_ACCESSIBILITY_TOOLBAR_BTN_HOME" desc="Content description for the home button.">
         Home
       </message>
+      <message name="IDS_ACCESSIBILITY_TOOLBAR_BTN_EXPAND" desc="Content description for the Chrome Home sheet expand button.">
+        Expand
+      </message>
       <message name="IDS_ACCESSIBILITY_BTN_REFRESH" desc="Content description for the refresh page button.">
         Refresh page
       </message>
       <message name="IDS_ACCESSIBILITY_BTN_STOP_LOADING" desc="Content description for the stop loading page button.">
         Stop page loading
       </message>
       <message name="IDS_ACCESSIBILITY_FIND_TOOLBAR_BTN_NEXT" desc="Content description for the button to go to the next find in page result.">
         Next
       </message>
       <message name="IDS_ACCESSIBILITY_FIND_TOOLBAR_BTN_PREV" desc="Content description for the button to go to the previous find in page result.">
@@ skipping 427 matching lines @@
         Remove and recreate this shortcut
       </message>
 
       <!-- Chrome Home -->
       <message name="IDS_BOTTOM_SHEET_HELP_BUBBLE_MESSAGE" desc="Text displayed in a help bubble above the bottom navigation sheet prompting users to pull the sheet up to see their bookmarks and other content.">
         Pull up to see bookmarks and more
       </message>
     </messages>
   </release>
 </grit>