Merge commit '69a841a1649390d68b32b3bcf0c429a60c400cfa' * commit '69a841a1649390d68b32b3bcf0c429a60c400cfa': Make sure the speech synthesizer proxy is a singleton in the TTS service.
Merge commit '69a841a1649390d68b32b3bcf0c429a60c400cfa' * commit '69a841a1649390d68b32b3bcf0c429a60c400cfa': Make sure the speech synthesizer proxy is a singleton in the TTS service.