Fix jumpiness when dragging surface down and up.

Currently the overshoot only works when you first open all apps and try
to extend the all apps to the top (making it overshoot). This pull works
when you go mFromState:Normal -> mToState:AllApps. However once the all
apps is set and you move the surface down then up..that overshoot
animation jumps AFTER your finger goes all the way up and off the
screen. At this point, once all apps is completely opened.. the states are
mFromState:AllApps -> mToState:Normal.

Now with this change, it addresses the jumpiness by considering the
current states (mFromState==AllApps) by
including the same onPull() but with different calculations

bug: 240669628
test: manual - videos included in bug thread
Change-Id: I7873f1ec22574f87fab3d2f11d1f5a5f81dfb5bc