Create a shortcut desktop to fullscreen.

Create necessary hooks for desktop to fullscreen keyboard shortcut.
Since both desktop to fullscreen and split to fullscreen will be using
the same keyboard shortcut combine both on the StatusBarManager side as
moveFocusedTasktoFullscreen.

Test: atest DesktopTasksController
Test: Manually trigger the shortcut to move from desktop to fullscreen
Test: Manually trigger the shortcut to move from split to fullscreen
Bug: 326061209
Flag: ACONFIG com.android.wm.shell.enable_desktop_windowing DEVELOPMENT
Change-Id: Ic5f8af23f55e30c971c115a20960f7336beb8629