There is no point to defer the install when allow_kiosk_app_control_os_version policy is not set.

The current impl only considers the platform version and manifest key [1]. This could end up deferring the app install indefinitely.

[1] https://cs.chromium.org/chromium/src/chrome/browser/chromeos/app_mode/kiosk_app_update_install_gate.cc?rcl=1479284732&l=21-40