Fixes a bug where the user ends in freescroll state even for regular workspace mode.

The bug happened while reordering pages in overview mode and clicking the back button.
The fix is to check the precodition in enableFreeScroll if we are in a valid state for enabling freescroll (currently only overview mode).

Bug: 33347786
Change-Id: Icc3005fd431569e2b9e3f52d2249de8ba8d13eab