Dump ExpandableView clip bounds

Applying a clipping bound to the notification row would be one more way
to get to the "empty space in shade" state, and yet it is not included
in the bugreports.

Bug: 369608449
Test: dumpsysui NotificationStackScrollLayout
Flag: EXEMPT changing dumps only
Change-Id: I3ea395555dd0005701a3ffc71ba58dcb62fcc6e3