[Android]: Hide add-to-homescreen app menu item when WebAPK is installed

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 1571 matching lines @@
         Select a tab to beam
       </message>
       <message name="IDS_NFC_BEAM_ERROR_BAD_URL" desc="Android Beam error - the current tab has an invalid url [CHAR-LIMIT=40]">
         Can’t beam current tab
       </message>
 
       <!-- Add to Home screen strings -->
       <message name="IDS_MENU_ADD_TO_HOMESCREEN" desc="Menu item for adding a shortcut to the Home screen (default title). [CHAR-LIMIT=27]">
         Add to Home screen
       </message>
+      <message name="IDS_MENU_OPEN_WEBAPK" desc="Menu item for opening the installed WebAPK associated with the current PWA. [CHAR-LIMIT=27]">
+        Open <ph name="WEBAPK_NAME">%1$s<ex>Telegram</ex></ph>
+      </message>
+      <message name="IDS_OPEN_WEBAPK_FAILED" desc="Opening of a WebAPK failed. [CHAR-LIMIT=27]">
+        Could not launch app
+      </message>
       <message name="IDS_MENU_ADD_TO_HOMESCREEN_ADD" desc="Menu item for adding a shortcut to the Home screen. [CHAR-LIMIT=27]">
         Add shortcut
       </message>
       <message name="IDS_MENU_ADD_TO_HOMESCREEN_INSTALL" desc="Menu item for adding a shortcut to the Home screen. [CHAR-LIMIT=27]">
         Install web app
       </message>
       <message name="IDS_APP_BANNER_ADD" desc="A button in an app banner to confirm adding a site to homescreen">
         Add
       </message>
       <message name="IDS_APP_BANNER_INSTALL" desc="A button in an app banner to confirm adding a site to homescreen">
@@ skipping 1138 matching lines @@
       </message>
       <message name="IDS_VR_SERVICES_CHECK_INFOBAR_INSTALL_BUTTON" desc="Text to be displayed in the VR Services check infobar confirm button for installing.">
         Install
       </message>
       <message name="IDS_VR_SERVICES_CHECK_INFOBAR_UPDATE_BUTTON" desc="Text to be displayed in the VR Services check infobar confirm button for updating.">
         Update
       </message>
     </messages>
   </release>
 </grit>