Merge "floss: Abort freshness_check JoinHandle before dropping."

    /// Check whether found devices are still fresh. If they're outside the

    /// freshness window, send a notification to clear the device from clients.

    pub(crate) fn trigger_freshness_check(&mut self) {

        // Drop previous joinhandle

        if let Some(ref handle) = self.freshness_check {

            // Abort and drop the previous JoinHandle.

            handle.abort();

            self.freshness_check = None;

        }

        // A found device is considered fresh if:

        // * It was last seen less than |FOUND_DEVICE_FRESHNESS| ago.