Merge "Don't toggle scrollbar during predicitve back swipe to avoid flicker" into main

quickstep/src/com/android/launcher3/taskbar/allapps/TaskbarAllAppsSlideInView.java

@@ -35,7 +35,6 @@ import androidx.annotation.Nullable;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Insettable;
 import com.android.launcher3.R;
-import com.android.launcher3.allapps.AllAppsRecyclerView;
 import com.android.launcher3.anim.AnimatorListeners;
 import com.android.launcher3.anim.PendingAnimation;
 import com.android.launcher3.config.FeatureFlags;
@@ -212,11 +211,6 @@ public class TaskbarAllAppsSlideInView extends AbstractSlideInView<TaskbarOverla
         super.onScaleProgressChanged();
         mAppsView.setClipChildren(!mIsBackProgressing);
         mAppsView.getAppsRecyclerViewContainer().setClipChildren(!mIsBackProgressing);
-        AllAppsRecyclerView rv = mAppsView.getActiveRecyclerView();
-        if (rv != null && rv.getScrollbar() != null) {
-            rv.getScrollbar().setVisibility(
-                    mIsBackProgressing ? INVISIBLE : VISIBLE);
-        }
     }
 
     @Override

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

@@ -295,9 +295,6 @@ public class AllAppsTransitionController
         mLauncher.getScrimView().setScrimHeaderScale(scaleProgress);
 
         AllAppsRecyclerView rv = mLauncher.getAppsView().getActiveRecyclerView();
-        if (rv != null && rv.getScrollbar() != null) {
-            rv.getScrollbar().setVisibility(scaleProgress < 1f ? View.INVISIBLE : View.VISIBLE);
-        }
 
         // Disable view clipping from all apps' RecyclerView up to all apps view during scale
         // animation, and vice versa. The goal is to display extra roll(s) app icons (rendered in

src/com/android/launcher3/widget/picker/WidgetsFullSheet.java

@@ -27,7 +27,6 @@ import android.animation.Animator;
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Rect;
-import android.os.Build;
 import android.os.Bundle;
 import android.os.Parcelable;
 import android.os.Process;
@@ -47,12 +46,9 @@ import android.view.animation.Interpolator;
 import android.widget.Button;
 import android.widget.LinearLayout;
 import android.widget.TextView;
-import android.window.BackEvent;
 
-import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.Px;
-import androidx.annotation.RequiresApi;
 import androidx.annotation.VisibleForTesting;
 import androidx.recyclerview.widget.DefaultItemAnimator;
 import androidx.recyclerview.widget.RecyclerView;
@@ -903,17 +899,6 @@ public class WidgetsFullSheet extends BaseWidgetSheet
         return isFoldUnFold || useDifferentLayoutOnOrientationChange;
     }
 
-    @Override
-    @RequiresApi(Build.VERSION_CODES.UPSIDE_DOWN_CAKE)
-    public void onBackProgressed(@NonNull BackEvent backEvent) {
-        super.onBackProgressed(backEvent);
-        // In two pane picker, scroll bar is always hidden.
-        if (!isTwoPane()) {
-            mFastScroller.setVisibility(
-                    backEvent.getProgress() > 0 ? View.INVISIBLE : View.VISIBLE);
-        }
-    }
-
     @Override
     public void onBackInvoked() {
         if (mIsInSearchMode) {