chromeos: Fix OS settings account manager policy icon alignment

It just needs some margin on the top.

Before: http://screen/z71qzJj0EJH
After: http://screen/Nw4HWw6FUyC

Bug: 996499
Change-Id: I3eacf6e23aa59b88794ef97fa11c37dbfda7cf84
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1769052
Commit-Queue: James Cook <jamescook@chromium.org>
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Auto-Submit: James Cook <jamescook@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#689992}

chrome/browser/resources/settings/people_page/account_manager.html

@@ -17,6 +17,10 @@
 <dom-module id="settings-account-manager">
   <template>
     <style include="settings-shared iron-flex iron-flex-alignment">
+      :host {
+        --add-account-margin-top: 16px;
+      }
+
       .profile-icon {
         background: center / cover no-repeat;
         border-radius: 20px;
@@ -40,16 +44,17 @@
         margin-inline-start: 60px;
       }
 
-      cr-policy-indicator {
-        margin-inline-end: 1em;
-      }
-
       #account-list-header {
         padding-bottom: 8px;
       }
 
+      cr-policy-indicator {
+        margin-inline-end: 1em;
+        margin-top: var(--add-account-margin-top);
+      }
+
       #add-account-button {
-        margin-top: 16px;
+        margin-top: var(--add-account-margin-top);
       }
 
       #add-account-icon {