Merge "Delete bcast_event_timestamps flag." into main

     description: "Add a new callback in Service to indicate a FGS has reached its timeout."

     bug: "317799821"

}

flag {

    name: "bcast_event_timestamps"

    is_exported: true

    namespace: "backstage_power"

    description: "Add APIs for clients to provide broadcast event trigger timestamps"

    bug: "325136414"

}