Merge "Adds three_button_corner_swipe flag." into main

  description: "Enables new interactive tutorial for learning touchpad gestures"

  bug: "309928033"

}

flag {

    name: "three_button_corner_swipe"

    namespace: "systemui"

    description: "Allow the Assistant corner swipe gesture while in 3 button mode"

    bug: "361651619"

}