Can't receive Motion Events with Window.Callback

Question

My task is receiving all motion events in android application with good embedding (library variant). I create my Window.Callback wrapper.

public class WindowCallback implements Window.Callback {

private final Window.Callback wrapper;

    public WindowCallback(Window.Callback callback) {        
        this.wrapper = callback;
    }

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
         return wrapper.dispatchKeyEvent(event);
    }

    @Override
    public boolean dispatchKeyShortcutEvent(KeyEvent event) {
         return wrapper.dispatchKeyShortcutEvent(event);
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {        
        return wrapper.dispatchTouchEvent(event);
    }

    // other methods omitted
}

Then, instantiate it in Activity:

final Window window = getWindow();
final Window.Callback windowCallback = window.getCallback();
final WindowCallback callbackWrapper = new WindowCallback(windowCallback);
window.setCallback(interceptCallback);

But when I have Toolbar in Activity, this Toolbar capture Window.Callback in method setActionBar(Toolbar) or setSupportActionBar(Toolbar). Code snippet from framework Activity:

if (toolbar != null) {
        final ToolbarActionBar tbab = new ToolbarActionBar(toolbar, getTitle(), this);
        mActionBar = tbab;
        mWindow.setCallback(tbab.getWrappedWindowCallback());

And ToolbarActionBar from support library:

ToolbarActionBar(Toolbar toolbar, CharSequence title, Callback windowCallback) {
    this.mDecorToolbar = new ToolbarWidgetWrapper(toolbar, false);
    this.mWindowCallback = new ToolbarActionBar.ToolbarCallbackWrapper(windowCallback);
    this.mDecorToolbar.setWindowCallback(this.mWindowCallback);
    toolbar.setOnMenuItemClickListener(this.mMenuClicker);
    this.mDecorToolbar.setWindowTitle(title);
}

Question is - How to check when Toolbar catch Window.Callback, but without creating base activity and extending from it. This check should execute not very frequently. (OnGlobalLayoutListener not our case)