OsSettingsLanguages: Fix missing outline on IME item

Like the V1 settings page, every disabled IME can be tab-selected to
enable it. However, the outline showing that the IME was selected was
hidden, which made it unclear what the currently tab-selected item was
without using ChromeVox.

This CL unhides the outline, making it clear that the IME item is
selected.

Fixed: 1163872
Change-Id: I708f2e2d666da0dfe6e4a6f3a831f8e5a92b0bb9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2616640Reviewed-by: My Nguyen <myy@chromium.org>
Commit-Queue: Michael Cui <mlcui@google.com>
Cr-Commit-Position: refs/heads/master@{#841315}

chrome/browser/resources/settings/chromeos/os_languages_page/input_page.html

@@ -137,7 +137,7 @@
           <template is="dom-repeat"
               items="[[languages.inputMethods.enabled]]">
             <div class$="list-item [[getInputMethodItemClass_(
-                item.id, languages.inputMethods.currentId)]] no-outline"
+                item.id, languages.inputMethods.currentId)]]"
                 actionable on-click="onInputMethodClick_"
                 on-keypress="onInputMethodKeyPress_"
                 tabindex$="[[getInputMethodTabIndex_(