Settings: Network: Support choose mobile network

chrome/app/settings_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Settings-specific strings (included from generated_resources.grd). -->
 <grit-part>
   <!-- Main Page -->
   <if expr="chromeos">
     <message name="IDS_SETTINGS_SECONDARY_USER_BANNER" desc="Banner displayed in settings page when the user is secondary in a multi-profile session.">
       Some settings belonging to <ph name="PRIMARY_EMAIL">$1<ex>john@google.com</ex></ph> are being shared with you. These settings only affect your account when using multiple sign-in.
     </message>
   </if>
 
@@ skipping 1162 matching lines @@
     </message>
     <message name="IDS_SETTINGS_INTERNET_NETWORK_SECTION_PROXY_ACCESSIBILITY_LABEL" desc="Label for the button that toggles showing the proxy configuration settings. Only visible by screen reader software.">
       Show proxy settings
     </message>
     <message name="IDS_SETTINGS_INTERNET_NETWORK_SECTION_WPAD" desc="Settings > Internet > Network details: Web Proxy Auto Discovery (WPAD) section label.">
       Web Proxy Auto Discovery URL:
     </message>
     <message name="IDS_SETTINGS_SETTINGS_NETWORK_ALLOW_DATA_ROAMING" desc="Settings > Internet > Network details: Toggle label to allow mobile data roaming.">
       Allow mobile data roaming
     </message>
+    <message name="IDS_SETTINGS_SETTINGS_NETWORK_CHOOSE_MOBILE_DETAIL" desc="Settings > Internet > Network details: Label for section to choose a mobile data network.">
+      Choose a mobile data network
+    </message>
+    <message name="IDS_SETTINGS_SETTINGS_NETWORK_CHOOSE_MOBILE_BUTTON" desc="Settings > Internet > Network details: Label for button to choose a mobile data network.">
+      Choose network
+    </message>
     <message name="IDS_SETTINGS_INTERNET_NETWORK_SHARED" desc="Settings > Internet > Network details: Text to show when a network is shared.">
       Other users of this device can use this network.
     </message>
     <message name="IDS_SETTINGS_INTERNET_NETWORK_PRIMARY_USER_CONTROLLED" desc="Settings > Internet > Network details: Text to show when a network configuration is controlled by the primary user.">
       Network configuration is controlled by <ph name="USER_EMAIL">$1<ex>joe@gmail.com</ex></ph>.
     </message>
     <message name="IDS_SETTINGS_INTERNET_NETWORK_PROXY_ENFORCED_POLICY" desc="Settings > Internet > Network details: Text to show when a network proxy is policy enforced.">
       This proxy is enforced by your administrator
     </message>
     <message name="IDS_SETTINGS_INTERNET_NETWORK_PROXY_ALLOW_SHARED" desc="Settings > Internet > Network details: Text next to the checkbox for allowing proxy settings for shared networks.">
@@ skipping 2000 matching lines @@
       System
     </message>
     <message name="IDS_SETTINGS_SYSTEM_HARDWARE_ACCELERATION_LABEL" desc="Label for the checkbox that forces Chrome to render via hardware acceleration (GPU) when available.">
       Use hardware acceleration when available
     </message>
     <message name="IDS_SETTINGS_SYSTEM_PROXY_SETTINGS_LABEL" desc="Label for the control that opens a user's network proxy settings.">
       Open proxy settings
     </message>
   </if>
 </grit-part>