[TSD] add annotation for the header & footer language selector

Description

  1.  

    1. Description

This PR adds annotations for the header & footer language selector:
`SHOW_HEADER_LANGUAGE_SELECTOR`
`SHOW_FOOTER_LANGUAGE_SELECTOR`

  1.  

    1. Supporting information

https://github.com/edx/edx-platform/pull/15133

Done

Assignee

Sofiane Bebert

Reporter

Open Source Pull Request Bot

Labels

Contributor Name

Jayram Nai

Repo

edx/edx-platform

Customer

None

Epic Link

None

OSCM Assignee

None

Platform Map Area (Levels 1 & 2)

None

Platform Map Area (Levels 3 & 4)

None

Blended Hour Utilization Percentage

None

edX Theme

None

edX Squad

None

Github Lines Added

17

Github Lines Deleted

2

Priority

Unset