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

chrome/android/java/strings/android_chrome_strings.grd

Index: chrome/android/java/strings/android_chrome_strings.grd
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index 2b6c588f7182065b76a0956369b8caccfafee1f7..542e470a40bc9a979a0408f64aac74036f83ae24 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -1584,6 +1584,12 @@ To obtain new licenses, connect to the internet and play your downloaded content
       <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 fails. [CHAR-LIMIT=27]">

[pkotwicz, 2017/02/22 16:50:19]

Nit: "fails" -> "failed"

[gonzalon, 2017/02/22 17:17:40]

Done.

+        Failed to open
+      </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>