TextToSpeech API does not work until TTS Settings are opened

• /e/ version: 1.7-s-rc
• Device model(s): emerald but any
• Developer mode enabled: yes
• Device rooted: no
• Trackers blocker enabled: no

Summary

TextToSpeech API does not work until TTS Settings are opened

Description

Afer a clean flash of a device, a sample app using the TextToSpeech API doesn't play any sound.

We need to open Settings -> Accessibility -> Text-to-speech output and from this point we are now able to play a sound with the TTS API.

The issue happens with both espeaktts and picotts at boot.

The issue might be located in frameworks_base or the settings app.

Sample code used for test:

        val onInitListener = TextToSpeech.OnInitListener { }
        tts = TextToSpeech(baseContext, onInitListener)

        tts.speak("Hello world!", TextToSpeech.QUEUE_FLUSH, null)