Turn off home relaunch on display move

Relaunching home app merged in ag/31315497 unintentionally steals
display focus.
This is workaround fix for connected display development until the
general focus behaviour with home is defined.

Bug: b/392480634
Test: atest DesktopTasksControllerTest
Flag: EXEMPT bug fix
Change-Id: I9a7c3bc43f9dd250699068ecdff7c91083dcda11