add title to profile notifications page

fixes VICE-1780
flag=none

test plan:
  - navigate to /profile/communication
    - the page title should be 'Account Notification Settings'

qa risk: low

Change-Id: Iea87b401973147e98b1c760602b343d7ce1f68d0
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/270395
Tested-by: Service Cloud Jenkins <svc.cloudjenkins@instructure.com>
Reviewed-by: Drake Harper <drake.harper@instructure.com>
QA-Review: Drake Harper <drake.harper@instructure.com>
Product-Review: Davis Hyer <dhyer@instructure.com>

app/controllers/profile_controller.rb

@@ -234,6 +234,7 @@ class ProfileController < ApplicationController
     @user = @current_user
     @current_user.used_feature(:cc_prefs)
     @context = @user.profile
+    @page_title = t('account_notification_settings_title', 'Account Notification Settings')
     set_active_tab 'notifications'
 
     add_crumb(@current_user.short_name, profile_path)

spec/controllers/profile_controller_spec.rb

@@ -331,4 +331,16 @@ describe ProfileController do
       end
     end
   end
+
+  describe "communication" do
+    context "when rendering the full view" do
+      render_views
+
+      it "sets the appropriate page title" do
+        user_session(@user)
+        get "communication"
+        expect(response.body).to include "<title>Account Notification Settings</title>"
+      end
+    end
+  end
 end