Revert "Remove Desity changer"

This reverts commit ff7bafc470c695f9ef98e748ce384eb5e31ffb44.
Revert "Fix FC on third party keyboard setup. - CarbonRom"

This reverts commit c08ba6c9f00400566658ebae08ab79807b7789b4.
Revert "Revert "Revert "Settings: Toggle to disable fullscreen keyboard (2/2) - CarbonRom"""

This reverts commit 1762c6caf910f4cfa15bddbdb23b81394abadda4.