Revert "Updating the scroll calculation from recyclerView to avoid view inflation"

This reverts commit 20bbe95ddb.

Reason for revert: Causing flake in Ironwood test: b/248295569

Test: ABTD
Before: Flaky, 14/50 PASSED
https://android-build.googleplex.com/builds/abtd/run/L33900000956890639

Revert: 50/50 PASSED
https://android-build.googleplex.com/builds/abtd/run/L49200000956887317

Change-Id: I41f4428c74e581323f90c716a7852b5e553ae27d

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

@@ -103,8 +103,7 @@ 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).computeVerticalScrollOffset());
+                    updateHeaderScroll(((AllAppsRecyclerView) recyclerView).getCurrentScrollY());
                 }
             };