State is not defined for toggle button

[zhr1130]

In the checkbox tree, state of toggle buttons are not defined . Screen reader user will be affected if state is not being announced by screen reader as user won't be get an idea of state of control.

Actual Result: State is not defined for button control which screen reader only announces button

Expected Result: State should define for button control so that screen reader user could get know state of control and also screen reader should announce position of items.