[Shell-Trans] Update keyguard occluded status to KeyguardService

...even if no change involved.
The occluded status could change while screen off, so there will
no visibility change in that transition. But we should allow that
transition to dispatched to KeyguardService so the occluding status
can align.

Bug: 266953625
Test: run testLaunchNoHistoryActivityOnNewDisplay with enable keyguard.
Verify the KeyguardService won't stuck in occluded after test finish.

Change-Id: I7438de3c1892bccaf80ce644548a4c86c078cd17