[Motion] Split-shade expansion on LS: decrease duration of scrim fade

Decreases the drag amount required for the scrim fade to complete.
With this change, QS only start fading in after the scrim has already
completed fading in. Before, QS were starting to show when the scrim
wasn't fully opaque yet.

Fixes: 222032168
Test: Manually
Change-Id: I23e0d0b3644472d6ea26882bdee6a6aee5850a84