Goal: Go to settings, open notification tab and switch on Allow notifications
Steps:
action: action_type: navigate_back
step_instruction: Go back to the previous page
action: action_type: click
step_instruction: Click on the Google icon at the top left corner of the screen to view settings option 
action: action_type: click
step_instruction: Click on the settigns icon at the bottom left corner of the screen to open settings
action: action_type: click
step_instruction: Click on the notifications tab
action: action_type: click
step_instruction: Switch on the toggle button of Allow notifications