Update expected scenario for DismissSplitScreenByDivider

In this case we don't seem to tag the SPLIT_SCREEN_EXIT cuj

Bug: 300260196
Test: atest com.android.wm.shell.flicker.service.splitscreen.flicker.DismissSplitScreenByDividerGesturalNavLandscape
Change-Id: I3b507f5cab638376c170255df9e93d0ca496bb06
2 files changed