chore(android): cleanup font variable names, remove obsolete code
This change renames the font variable names so that they match the two conceptual fonts we have. Also remove obsolete code that dealt with the `font` parameter being a JSON object instead of a string containing the font filename. Having the `font` parameter containing a JSON object was legacy code that won't happen with current Keyman versions.
Follow-up-of: #16188
Keyman makes it possible for you to type in any language
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share them with the community in the keyboards
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Community have so far contributed
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Keyman is an open source project distributed under the MIT license.