[CrOS MultiDevice] Remove usage of $i18n{} from HTML resources.

A future CL will move these resources to chrome://resources, which does
not have support for $i18n (see [1]). Instead, each $i18n{foo} instance
was replaced with [[i18n('foo')]].

[1] https://cs.chromium.org/chromium/src/ui/webui/resources/cr_components/README.md

Bug: 884041
Change-Id: I4d6ee99f0cd66aee55cf12a47673fc01e46c87a4
Reviewed-on: https://chromium-review.googlesource.com/1232415
Commit-Queue: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#592264}

chrome/browser/resources/chromeos/multidevice_setup/password_page.html

@@ -32,9 +32,9 @@
           <span id="email">[[email_]]</span>
         </div>
         <cr-input id="passwordInput" type="password"
-            placeholder="$i18n{enterPassword}"
+            placeholder="[[i18n('enterPassword')]]"
             invalid="[[passwordInvalid_]]"
-            error-message="$i18n{wrongPassword}"
+            error-message="[[i18n('wrongPassword')]]"
             value="{{inputValue_}}"
             aria-disabled="false"
             on-change="onUserPressedEnter_">

chrome/browser/resources/chromeos/multidevice_setup/start_setup_page.html

@@ -86,24 +86,26 @@
           </div>
           <div id="feature-details-container" class="flex">
             <div id="feature-details-container-header">
-              $i18n{startSetupPageFeatureListHeader}
+              [[i18n('startSetupPageFeatureListHeader')]]
             </div>
             <div class="feature-detail">
               <iron-icon icon="multidevice-setup-icons-20:messages"></iron-icon>
-              <span>$i18nRaw{startSetupPageFeatureListAwm}</span>
+              <span inner-h-t-m-l="
+                  [[i18nAdvanced('startSetupPageFeatureListAwm')]]">
+              </span>
             </div>
             <div class="feature-detail">
               <iron-icon icon="multidevice-setup-icons-20:downloads">
               </iron-icon>
-              <span>$i18n{startSetupPageFeatureListInstallApps}</span>
+              <span>[[i18n('startSetupPageFeatureListInstallApps')]]</span>
             </div>
             <div class="feature-detail">
               <iron-icon icon="multidevice-setup-icons-20:features"></iron-icon>
-              <span>$i18n{startSetupPageFeatureListAddFeatures}</span>
+              <span>[[i18n('startSetupPageFeatureListAddFeatures')]]</span>
             </div>
           </div>
         </div>
-        <div id="footnote">$i18n{startSetupPageFootnote}</div>
+        <div id="footnote">[[i18n('startSetupPageFootnote')]]</div>
       </div>
     </ui-page>
   </template>