Fix keyguard tests for background wm_state_refactor calls

When the background wm_state_refactor calls change happened, the test
covering the new keyguard transition is not updated accordingly.

Update the test to make the behavior matches the legacy keyguard.

Test: WindowManagerLockscreenVisibilityManagerTest
Bug: 422127126
Bug: 364930619
Flag: com.android.window.flags.ensure_keyguard_does_transition_starting
Change-Id: If4539b82abcddb6e091353078aab731badccdd91