Credit to PM_ME_2LEARNHOW2CODE from r/GooglePixel:
To autohide statusbar only, use command:
adb shell settings put global policy_control immersive.status=*
To autohide navbar only, use command:
adb shell settings put global policy_control immersive.navigation=*
To autohide both nav and status bar, use command:
adb shell settings put global ...
Well that took quite a bit of work. In the end I was able to get the custom firmware for the Hudl mentioned on the MoDaCo forum. After that the difficulty was getting the USB Drivers up and running to get the Hudl happy as an MTP device. I think this is how it went...
Enable Developer Settings & USB Debugging - This Hudl is an Android 4.2.2 device so ...
I used Nexus Root Toolkit on my Nexus 4 with Android 5.1.1. Here's what I did:
Rooted my Nexus 4
Launch → Fastboot Flash → Recovery→ Latest CWM
It installs Quick Reboot app in your Nexus 4. Open it and "Recovery" will reboot your device in recovery mode. If it asks for root permission, grant it.
Install zip → Install zip from sideload
This is a "feature" on the update for the Lenovo P780 I'm afraid. Other users are reporting the same issue (amongst others) with the device.
User 0 is the "first" user on the device, i.e. the "administrator" profile. You could then add subsequent profiles (1, 2, 3) etc for other users of the device. This information is not usually displayed.
You can read ...