Updater - Prevent device from going to sleep while system update is in progress

• /e/ version: 2.9 (and before) ... 3.0.4-s/-t
• Device model(s): OnePlus Nord (avicii), Google Pixel 6 Pro (raven)

While the System Updater is updating the phone the system should not go to sleep (switch off and lock the screen)!

If the device is locked the update process is paused and will only continue after unlocking the phone. Since the update process sometimes keeps a lot of time the user has to monitor the process (staring on the progress bars) and has to touch the screen regularly to prevent it from locking. That's a bit annoying.