Transition to using matrix-doc for SAS Emoji translations

[turt2live]

See matrix-org/matrix-spec-proposals#2728

EDIT Benoit:
IIUC, we should, to handle this issue:

• Remove all existing SAS emoji words from our current SDK codebase (strings.xml files)
• Write a script to import translations from the file https://raw.githubusercontent.com/matrix-org/matrix-doc/master/data-definitions/sas-emoji.json into file (SDK) value/strings_sas.xml and files value-XX/strings_sas.xml to not interfere with existing strings.xml files already handled by Weblate Element Android project. Note: we can get inspiration from the script https://github.com/matrix-org/matrix-doc/blob/master/scripts/i18n.py which actually update the file sas-emoji.json with the exploded translations from Weblate. So we are doing the revers operation here, the advantage is that the script will download only one file.

And before each release we should:

• run the script created above and commit changes.

[progserega]

Do this translation will be use in selection of emogi in "text-edit" window? For non-english users to hard understand how needed emoji named and how it is select by ':'...

[turt2live]

This is only for the emoji used during device verification, nothing to do with the text editing or : selection.

[progserega]

It's a pity!

[bmarty]

We have only 64 emojis for verification so only 64 words to translate.
Emojis that user can include in messages comes from this big file and there is no translation for those data at the moment. We should open a dedicated issue to improve that.