Merge "Create enable_desktop_windowing_multi_instance_features flag." into main

    description: "Whether to enable desktop windowing transition handler and observer instead of task listeners."

    bug: "332682201"

}

flag {

    name: "enable_desktop_windowing_multi_instance_features"

    namespace: "lse_desktop_experience"

    description: "Whether to enable multi-instance support in desktop windowing."

    bug: "336289597"

}