Fixes to all apps pull up work

b/28917826

- 2+ workspace page also slides up
- pull up touch interaction doesn't trigger only when yslop > xslop
- animation duration should be set independently when all apps button is used.
- workspace state is correctly set (drag and drop from the trays work)
- after lock screen, hotseat is positioned correctly
- Remove initial jump when sliding up
- Improved tuning on sliding
- Alpha value set differently on backbround and content of all apps

Still not fixed:
- Landscape
- Search edit text box styling
- All apps scroll bar

Change-Id: I817094b0f1ada5052ee604539459f556a99cadf1

src/com/android/launcher3/PagedView.java

@@ -1971,7 +1971,7 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
         snapToPage(getPageNearestToCenterOfScreen(), PAGE_SNAP_ANIMATION_DURATION);
     }
 
-    private static class ScrollInterpolator implements Interpolator {
+    public static class ScrollInterpolator implements Interpolator {
         public ScrollInterpolator() {
         }