Fixes addModuleStyles() violation from T92459 (a464d1d41).
Similar to 93ed259cf and Id2342454b for the 'site' module.
Doesn't need to be in separate commits since per-user HTML isn't
cached the same way.
Bug: T92459
Bug: T108590
Change-Id: I195f67d061de1306c97413aada7919e9f1b1d12c