Solved
available audio stream global variables don't include the accessibility stream (STREAM_ACCESSIBILITY) https://developer.android.com/reference/android/media/AudioManager
I use the TalkBack screen reader. I'd like to adjust the accessibility stream. The volume buttons control only the "active" stream, so not always relyable. I have tasks to adjust other streams, they work very well, but adding a global variable for this stream would help a lot. Documentation for STREAM_ACCESSIBILITY: https://developer.android.com/reference/android/media/AudioManager
Thank you.
