Android: Add "Broadband Adapter (Built In)" to settings

This makes the feature added in 01ada3850f available in the Android GUI.

Source/Android/app/src/main/res/values/arrays.xml

@@ -102,11 +102,13 @@
         <item>Nothing</item>
         <item>Dummy</item>
         <item>Broadband Adapter (XLink Kai)</item>
+        <item>Broadband Adapter (Built In)</item>
     </string-array>
     <integer-array name="serialPort1DeviceValues" translatable="false">
         <item>255</item>
         <item>0</item>
         <item>10</item>
+        <item>12</item>
     </integer-array>
 
     <!-- GameCube System Languages -->

Source/Android/app/src/main/res/values/strings.xml

@@ -166,6 +166,8 @@
     <string name="xlink_kai_guide_header">For setup instructions, <a href="https://www.teamxlink.co.uk/wiki/Dolphin">refer to this page.</a></string>
     <string name="xlink_kai_bba_ip">XLink Kai IP Address/hostname</string>
     <string name="xlink_kai_bba_ip_description">IP address or hostname of device running the XLink Kai client</string>
+    <string name="bba_builtin_dns">DNS Server</string>
+    <string name="bba_builtin_dns_description">Use 8.8.8.8 for normal DNS, else enter your custom one</string>
 
     <!-- Interface Preference Fragment -->
     <string name="interface_submenu">Interface</string>