No speech output using PicoTTS with the "system" language

[drmfinlay]

Thank you @relan for reporting this bug in fdroiddata merge request 5900. I've pasted your report and steps below.

I stumbled upon the following issue initially. I have a tablet with AOSP 8.1. Pico TTS has a language setting set to system, which is none of the supported ones. When I was trying to speak some English text aloud, it didn't work. Steps to reproduce:

1. Check the languages in the Pico TTS settings. Mine has only English, Spanish, Italian, German and French. Set to System.
2. Set the system language to any but mentioned above.
3. Start TTS Util and try to speak some text.
4. Nothing is spoken, "Speech in progress" notification appears, "Stop speaking" button does nothing. Expected result: an error message saying that I should choose a supported language in the Pico TTS settings.

[drmfinlay]

I have reproduced this issue. It will be fixed in the next TTSUtil version. I should be releasing that sometime in the next few days.