Updating the scroll calculation from recyclerView to avoid view inflation

> Updating the LayoutManager's scroll calculation instead of a separate
  implementation to better support recyclerView's calculations
> Caching the view sizes during layout to avoid view-inflation for
  unknown types
> Fixing scrollbar jump during scroll when widget list is expanded
> Fixing scrollbar never reaching end when onboarding card is displayed
  in work tab

Bug: 240343082
Test: Verified on device that new views are not inflated
Change-Id: Ied11ccf65b053691c5c126c4bf8de306ec24786d

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

@@ -103,7 +103,8 @@ public abstract class BaseAllAppsContainerView<T extends Context & ActivityConte
             new RecyclerView.OnScrollListener() {
                 @Override
                 public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
-                    updateHeaderScroll(((AllAppsRecyclerView) recyclerView).getCurrentScrollY());
+                    updateHeaderScroll(
+                            ((AllAppsRecyclerView) recyclerView).computeVerticalScrollOffset());
                 }
             };