Initial Taskbar drag-n-drop support for search results.

- Includes initial support for obtaining PendingIntent for ITEM_TYPE_SEARCH_ACTION.
- Custom pre-drag conditions for search results can be provided through TaskbarSearchSessionController.
- Added detection for telling when DragView shift animation ends for
  pre-drag condition usage.

Test: Manual
Bug: 289261756
Flag: ENABLE_ALL_APPS_SEARCH_IN_TASKBAR
Change-Id: I52510a6f3ee49968134ecb591ef7c4df711b9d3d

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

@@ -15,11 +15,14 @@
  */
 package com.android.launcher3.taskbar.allapps;
 
+import android.view.View;
+
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
 import com.android.launcher3.R;
 import com.android.launcher3.appprediction.PredictionRowView;
+import com.android.launcher3.dragndrop.DragOptions.PreDragCondition;
 import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.taskbar.TaskbarControllers;
@@ -208,4 +211,12 @@ public final class TaskbarAllAppsController {
         // Allow null-pointer since this should only be null if the apps view is not showing.
         return mAppsView.getActiveRecyclerView().computeVerticalScrollOffset();
     }
+
+    /** @see TaskbarSearchSessionController#createPreDragConditionForSearch(View) */
+    @Nullable
+    public PreDragCondition createPreDragConditionForSearch(View view) {
+        return mSearchSessionController != null
+                ? mSearchSessionController.createPreDragConditionForSearch(view)
+                : null;
+    }
 }