Merge "InputReader: Notify policy of device changes after flushing events" into main

        std::swap(notifyArgs, mPendingArgs);

    } // release lock

    // Send out a message that the describes the changed input devices.

    if (inputDevicesChanged) {

        mPolicy->notifyInputDevicesChanged(inputDevices);

    }

    // Notify the policy of the start of every new stylus gesture outside the lock.

    for (const auto& args : notifyArgs) {

        const auto* motionArgs = std::get_if<NotifyMotionArgs>(&args);

        if (motionArgs != nullptr && isStylusPointerGestureStart(*motionArgs)) {

            mPolicy->notifyStylusGestureStarted(motionArgs->deviceId, motionArgs->eventTime);

        }

    }

    // Flush queued events out to the listener.

    // This must happen outside of the lock because the listener could potentially call

    // back into the InputReader's methods, such as getScanCodeState, or become blocked

    for (const NotifyArgs& args : notifyArgs) {

        mNextListener.notify(args);

    }

    // Notify the policy that input devices have changed.

    // This must be done after flushing events down the listener chain to ensure that the rest of

    // the listeners are synchronized with the changes before the policy reacts to them.

    if (inputDevicesChanged) {

        mPolicy->notifyInputDevicesChanged(inputDevices);

    }

    // Notify the policy of the start of every new stylus gesture.

    for (const auto& args : notifyArgs) {

        const auto* motionArgs = std::get_if<NotifyMotionArgs>(&args);

        if (motionArgs != nullptr && isStylusPointerGestureStart(*motionArgs)) {

            mPolicy->notifyStylusGestureStarted(motionArgs->deviceId, motionArgs->eventTime);

        }

    }

}

std::list<NotifyArgs> InputReader::processEventsLocked(const RawEvent* rawEvents, size_t count) {