Add Firefox versions for api.KeyboardEvent.KeyboardEvent.code_and_key_in_init (#11462)
Add Firefox versions for api.KeyboardEvent.KeyboardEvent.code_and_key_in_init (#11462)

This PR adds real values for Firefox and Firefox Android for the `KeyboardEvent.code_and_key_in_init` member of the `KeyboardEvent` API.  The `key` attribute had been around since the constructor's implementation (https://bugzil.la/930893), and the `code` attribute when it was added to the interface (https://bugzil.la/865649).
mdn/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data