Change website to better handle multi-locale Android .apk
Starting with #26483 (closed) fixed our .apk file contains all the locales we support. There is no per-locale .apk (anymore) and it is not planned to support that. But e.g. our alpha download page (https://www.torproject.org/projects/torbrowser.html.en#downloads-alpha) contains a table with all the available bundles per locale.
We worked around that by pointing to the multi-locale .apk for every locale we support but we might want to have something better than this stopgap.
We should revisit the other pages we have that offer the .apk for download to make sure we redesign the whole Android download part if needed and not just a single page.
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