Allow touches on Workspace during transition from Overview

Previously we only allowed touches on the hotseat (due to it being
in the shelf in Overview); now we allow touches anywhere if we are
not in an overview state.

Test: enter overview, swipe up to home and scroll workspace or tap
a workspace icon during the transition

Bug: 169052350
Change-Id: I59ee695ba9cb6f5fddd8e41c5796cdba6b3d2112

src/com/android/launcher3/Workspace.java

@@ -1175,13 +1175,6 @@ public class Workspace extends PagedView<WorkspacePageIndicator>
         computeScrollHelper(false);
     }
 
-    @Override
-    protected void determineScrollingStart(MotionEvent ev, float touchSlopScale) {
-        if (!isSwitchingState()) {
-            super.determineScrollingStart(ev, touchSlopScale);
-        }
-    }
-
     @Override
     public void announceForAccessibility(CharSequence text) {
         // Don't announce if apps is on top of us.