Update expected CUJ for DismissSplitScreenByGoHome

We don't seem to trigger a SPLIT_SCREEN_EXIT in this case yet.

Bug: 301222449
Test: atest com.android.wm.shell.flicker.service.splitscreen.flicker.DismissSplitScreenByGoHomeGesturalNavPortrait
Change-Id: I478f00db59a30188ac7038fac8172a6397294b2e
2 files changed