Hide views on lockscreen when wallpaper dream is active

When dreaming, only keyguard clock is visible on lockscreen.

Bug: b/285061111
Test: atest LockIconViewControllerWithCoroutinesTest
Test: atest KeyguardClockSwitchControllerWithCoroutinesTest
Test: atest KeyguardIndicationControllerWithCoroutinesTest
Change-Id: Ic38ad5c8260bb4869508a2d7b27ecd39a72d341e
Merged-In: Ic38ad5c8260bb4869508a2d7b27ecd39a72d341e