Ensures in all apps that the scrollposition and floating header

translation are reset correctly on closing all apps and switching tabs.

Change-Id: I86ba3e7bed4c27c485929af5920f76000d323875

src/com/android/launcher3/allapps/AllAppsContainerView.java

@@ -495,6 +495,7 @@ public class AllAppsContainerView extends RelativeLayout implements DragSource,
             public void onPageSelected(int pos) {
                 tabs.updateTabTextColor(pos);
                 mHeader.setMainActive(pos == 0);
+                reset();
                 applyTouchDelegate();
                 if (mAH[pos].recyclerView != null) {
                     mAH[pos].recyclerView.bindFastScrollbar();