[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 1566 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]">
+        Failed to open

[dominickn, 2017/02/23 05:53:55]

Ideally this would be:

Failed to open <appname> if we have an appname

Otherwise something like "Could not launch app" if we don't have an app name.

[gonzalon, 2017/02/23 16:49:57]

We could or could not have the app name, depending on the cause of the error. I
went with "Could not launch app" but let me know if you would prefer the other
message in the cases that the app failed to launch but we do have access to its
name. I can't think of a case where that would happen though, if this fails it
would most likely be because the package name could not be found for the url,
and even that shouldn't happen as you said in the other comment.

+      </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 1140 matching lines @@
       </message>
       <message name="IDS_KEYBOARD_SHORTCUT_CHROME_FEATURE_GROUP_HEADER" desc="A text label that appears above a list of shortcuts that are related to the Chrome app features. This group is part of several groups of keyboard shortcuts all shown in a dialog.">
         Google Chrome feature shortcuts
       </message>
       <message name="IDS_KEYBOARD_SHORTCUT_WEBPAGE_GROUP_HEADER" desc="A text label that appears above a list of shortcuts that are related to manipulation of the current tab window. This group is part of several groups of keyboard shortcuts all shown in a dialog.">
         Webpage shortcuts
       </message>
     </messages>
   </release>
 </grit>