Add Samsung DeX/Lenovo Productivity mode (Desktop mode) support

[goliv04053]

In my case I use a Lenovo Tablet who has a productivity mode option. Some Samsung devices have a similar function if I may recall from my memory (DeX mode). It gives a full screen almost like desktop application option when a keyboard and a mouse is used. It is possible to implement this feature?

[ajgh1]

Librera FD seems to work fine in DeX mode on my Samsung Galaxy Tab S6 with OneUI 3.1 (Android 11). Runs in windowed and maximized (full-screen) mode.