Making caret visibility part of state definition

> Hiding the caret in fast overview state
> Hiding caret in task swipe down interaction

Bug: 79700605
Change-Id: I984d535bc75802501e8aeb13c8f37387f331e5bc

quickstep/src/com/android/launcher3/uioverrides/OverviewState.java

@@ -100,9 +100,9 @@ public class OverviewState extends LauncherState {
     @Override
     public int getVisibleElements(Launcher launcher) {
         if (launcher.getDeviceProfile().isVerticalBarLayout()) {
-            return 0;
+            return VERTICAL_SWIPE_INDICATOR;
         } else {
-            return HOTSEAT_SEARCH_BOX |
+            return HOTSEAT_SEARCH_BOX | VERTICAL_SWIPE_INDICATOR |
                     (launcher.getAppsView().getFloatingHeaderView().hasVisibleContent()
                             ? ALL_APPS_HEADER_EXTRA : HOTSEAT_ICONS);
         }

quickstep/src/com/android/quickstep/views/LauncherRecentsView.java

@@ -35,6 +35,9 @@ import android.view.ViewDebug;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherState;
+import com.android.launcher3.R;
+import com.android.launcher3.anim.Interpolators;
+import com.android.launcher3.views.ScrimView;
 import com.android.quickstep.OverviewInteractionState;
 import com.android.quickstep.util.ClipAnimationHelper;
 import com.android.quickstep.util.LayoutUtils;
@@ -136,6 +139,12 @@ public class LauncherRecentsView extends RecentsView<Launcher> {
         }
         anim.play(ObjectAnimator.ofFloat(
                 mActivity.getAllAppsController(), ALL_APPS_PROGRESS, allAppsProgressOffscreen));
+
+        ObjectAnimator dragHandleAnim = ObjectAnimator.ofInt(
+                mActivity.findViewById(R.id.scrim_view), ScrimView.DRAG_HANDLE_ALPHA, 0);
+        dragHandleAnim.setInterpolator(Interpolators.ACCEL_2);
+        anim.play(dragHandleAnim);
+
         return anim;
     }
 
@@ -150,7 +159,7 @@ public class LauncherRecentsView extends RecentsView<Launcher> {
             mActivity.getStateManager().goToState(NORMAL, false /* animate */);
         } else {
             LauncherState state = mActivity.getStateManager().getState();
-            mActivity.getAllAppsController().setProgress(state.getVerticalProgress(mActivity));
+            mActivity.getAllAppsController().setState(state);
         }
         super.onTaskLaunched(success);
     }

quickstep/src/com/android/quickstep/views/ShelfScrimView.java

@@ -153,15 +153,6 @@ public class ShelfScrimView extends ScrimView {
         }
     }
 
-    @Override
-    protected void updateDragHandleAlpha() {
-        if (mDrawingFlatColor) {
-            super.updateDragHandleAlpha();
-        } else if (mDragHandle != null) {
-            mDragHandle.setAlpha(255);
-        }
-    }
-
     @Override
     protected void onDraw(Canvas canvas) {
         float translate = drawBackground(canvas);