Create the following file ~/.local/bin/wsl-toast-daemon:
#!/usr/bin/env python3
# wsl-toast-daemon: implements org.freedesktop.Notifications on the session bus
# and forwards each notification as a Windows toast (via powershell.exe WinRT).
# Waydroid's session auto-detects this service at start and forwards Android
# notifications to it. Must run in a WSL session with Windows interop alive.
import os
import subprocess
import threading