I can't figure this out. Tried your work and also tinkering with shell scripts and just can't get it to work.
The below works great in adb but please help getting it into MD for me. I'd like to use a quick settings toggle for a trigger.
Thank you
adb shell settings put secure enabled_accessibility_services com.google.android.marvin.talkback/com.google.android.marvin.talkback.TalkBackService
adb shell settings put secure enabled_accessibility_services com.android.talkback/com.google.android.marvin.talkback.TalkBackService