Add ADB Keys tab.

res/app/settings/general/language/language-controller.js

@@ -0,0 +1,9 @@
+module.exports = function ($scope, LanguageService, SettingsService) {
+  SettingsService.bind($scope, {
+    target: 'language'
+  , source: LanguageService.settingKey
+  , defaultValue: LanguageService.detectedLanguage
+  })
+
+  $scope.supportedLanguages = LanguageService.supportedLanguages
+}