[Unfold transition] Hide invisible workspaces during animation

Enables clipToPadding property for the
workspace view so it clips the views coming
from the outside of the workspace.

Bug: 267670594
Test: manual test by folding and unfolding with
 several pages on a foldable device
Change-Id: Ibcb6ecd1ce784a66fdee35969b7f460bbb32f638