Launch freeform activities in desktop mode

Freeform activities used to be launched in fullscreen if launched
outside of desktop. This change makes it so that when a freeform
activity is launched it will move it to desktop.

Bug: 340432515
Test: atest DesktopTasksControllerTest
Change-Id: Ibc697a4b0dff6a0b1583018d802b5caa66814220