KIO-GDrive appears to assign the mime type "application/x-vnd.oasis.opendocument.spreadsheet" to .ods files in src/gdrivehelper.cpp, however, the correct mime type is "application/vnd.oasis.opendocument.spreadsheet".
The patch which I have submitted adjusts the mime type. It also fixes a typo in the variable VND_OASIS_OPENDOCUMENT_SPREADSHEED which should actually be spelled as VND_OASIS_OPENDOCUMENT_SPREADSHEET ... if changes are made anyway, we might as well tackle both at the same time. :-)
References:
https://bugs.kde.org/show_bug.cgi?id=388598
https://wiki.documentfoundation.org/Faq/General/036
https://en.wikipedia.org/wiki/OpenDocument_technical_specification#Documents
BUG: 388598