Added custom VirGL and Termux:X11 flags support

Install the latest CI:
https://t.me/DroidspacesCI/490?single

Notes:

Many misunderstood the new Termux:X11 and VirGL features, expecting them to auto-boot a desktop environment. They won't unless you add a systemd service for it.

Proper usage in the exact order:

1. Install the latest Droidspaces CI, Termux, and Termux:X11 apps.
2. Update the Droidspaces backend and reboot your phone.
3. Open Termux and run:
apt update && apt install x11-repo && apt install termux-x11 virglrenderer-android
4. In Droidspaces, open your container config and toggle Termux:X11 and VirGL.
5. Start the container.

If successful, an X cursor will appear in the Termux:X11 app.

Note:

Droidspaces auto-injects the required environment variables. If using an alternative shell like ZSH, run:
source /etc/profile.d/droidspaces_env.sh