How to Programmatically Enable/Disable Accessibility Service in Android

Question

I would like to programmatically enable/disable Accessibility Services listed under Settings->Accessibility option.

I could start Accessibility Intent like below:

Answer 1

Just in case anybody still seeks to turn off talkback from adb when you are stuck in your lock screen entering the password or pin. One thing you can try is adb shell am force-stop com.google.android.marvin.talkback