add h1 to user profile page

flag=none
fixes VICE-1042

test plan:
- In your root account settings page,
   check Enable Profiles and save
- visit /profile
- Open your screenreader
- verify that it reads the hidden h1 as User Profile

Change-Id: Ia7f770d4d9a1fb5ed6dfde15fb61a9daf5820127
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/256551
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Davis Hyer <dhyer@instructure.com>
QA-Review: Davis Hyer <dhyer@instructure.com>
Product-Review: Davis Hyer <dhyer@instructure.com>

app/views/profile/show.html.erb

@@ -18,6 +18,7 @@
 <% provide :page_title, "User Profile" %>
 
 <div class="ic-Profile-layout">
+  <h1 class="screenreader-only"><%= t("User Profile") %></h1>
   <div class="ic-Profile-layout__Primary">
     <%= render 'shared/profile' %>
   </div>

spec/selenium/profile_spec.rb

@@ -389,6 +389,15 @@ describe "profile" do
     end
   end
 
+  it 'show /profile when enable_profiles = true' do
+    user_logged_in
+    account = Account.default
+    account.settings[:enable_profiles] = true
+    account.save!
+    get '/profile'
+    expect(fj("h1:contains('User Profile')").attribute('class')).to eq 'screenreader-only'
+  end
+
   describe "profile pictures s3 tests" do
     # TODO: reimplement per CNVS-29611, but make sure we're testing at the right level
     it "should successfully upload profile pictures"