I bought a new Pixel 3a XL and it has Android 10 on it but the webpage shows Android 9 works with ubuntu touch which I'd like to load onto my new pixel, do I need to change the android version to 9 before attempting to flash it? That would mean that the Halium version would need to be changed to 9? I'm so confused, never did this before, any suggestions on the software versions? And the factory image on my phone, since I just opened the box is original but not the one shown on the webpage, what to do with that? Will ubuntu touch work with Android 10 on a pixel 3a xl?