Add dumpsys and extra logging to FoldableDeviceStateProvider

Adds more debug information for bugreports and
more logging to better understand issues
when the device state switch doesn't happen
when expected.

Bug: 321875690
Test: manual fold/unfolds
Test: check dumpsys, logcat
Change-Id: Ibca507dc93d0f6db9ea545301cf94d73e3405739