Use committed display state in WallpaperService

Uses committed display state instead of
display state, so the wallpaper receive more
up-to-date information about visibility as
display power state could take a considerable
amount of time.

Test: manual, perfetto traces
Bug: 273204503
Change-Id: If747112d610822df116971b60b9a0b82a686a37a
Merged-In: If747112d610822df116971b60b9a0b82a686a37a