Change "Add Device" button to "Manage Devices" on ash tray bluetooth page.

ash/ash_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains the strings for ash.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/ash_strings.h" type="rc_header">
@@ skipping 261 matching lines @@
       </message>
       <message name="IDS_ASH_STATUS_TRAY_BLUETOOTH_CONNECTING" desc="Shows a connecting bluetooth device in the bluetooth list.">
         <ph name="BLUETOOTH">$1<ex>Apple Magic Mouse</ex></ph>: Connecting...
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DISABLE_BLUETOOTH" desc="The label used in the tray popup to disable bluetooth.">
         Disable Bluetooth
       </message>
       <message name="IDS_ASH_STATUS_TRAY_ENABLE_BLUETOOTH" desc="The label used in the tray popup to enable bluetooth.">
         Enable Bluetooth
       </message>
-      <message name="IDS_ASH_STATUS_TRAY_BLUETOOTH_ADD_DEVICE" desc="The label used in the tray popup to add a bluetooth device.">
-        Add device...
+      <message name="IDS_ASH_STATUS_TRAY_BLUETOOTH_MANAGE_DEVICES" desc="The label used in the tray popup to manage bluetooth devices.">
+        Manage devices...
       </message>
       <message name="IDS_ASH_STATUS_TRAY_BLUETOOTH_DISCOVERING" desc="The label used in the tray popup to show bluetooth is discovering devices.">
         Scanning for devices...
       </message>
 
       <message name="IDS_ASH_STATUS_TRAY_UPDATE" desc="The label used in the tray popup to notify that the user should restart to get system updates.">
         Restart to update
       </message>
       <message name="IDS_ASH_STATUS_TRAY_RESTART_AND_POWERWASH_UPDATE" desc="The label used in the tray popup to notify that the user should restart and powerwash to get system updates.">
         Restart and Powerwash to update
@@ skipping 257 matching lines @@
 
       <!-- ChromeOS-specific strings -->
       <if expr="pp_ifdef('chromeos')">
         <part file="ash_chromeos_strings.grdp" />
       </if>
 
     </messages>
   </release>
 </grit>