Fixed issue #17092 (#17243)
fixes #17092
Summary of the issue:
When using the display speech output braille mode with no braille display connected and the braille viewer closed, zero division errors are thrown
Description of user facing changes
The user can have braille mode set to display speech output at all times, without NVDA spamming the log file
Description of development approach
Made the showSpeechInBraille function return without doing anything if the braille.handler object is not enabled
