Swipe up from excludeFromRecents task should be shown left of desktop tasks

- excludeFromRecents are sometimes added as index 0 after moveRunningTaskToFront, breking the model that fullscreen tasks should be shown after desktop tasks
- Added getRunningTaskExpectedIndex to compute expected runningTask postion in all scenario, and apply this position both when adding the view in showCurrentTask and moveRunningTaskToExpectedPosition

Fix: 380232192
Test: Swipe up from following scenario in phone/tablet, repeat several times
1) 1st fullscreen task
2) 2nd fullscreen task
3) excludeFromRecents task
4) Desktop task
Flag: EXEMPT BUG_FIX

Change-Id: Iec551fb1403a6bb5307b684a50f7ae7d31bd4644

quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java

@@ -783,7 +783,7 @@ public abstract class AbsSwipeUpHandler<
                 && recentsAttachedToAppWindow) {
             // Only move running task if RecentsView has never been attached before, to avoid
             // TaskView jumping to new position as we move the tasks.
-            mRecentsView.moveRunningTaskToFront();
+            mRecentsView.moveRunningTaskToExpectedPosition();
         }
         mAnimationFactory.setRecentsAttachedToAppWindow(
                 recentsAttachedToAppWindow, animate, updateRunningTaskAlpha);

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

@@ -1773,26 +1773,17 @@ public abstract class RecentsView<
     }
 
     /**
-     * Moves the running task to the front of the carousel in tablets, to minimize animation
-     * required to move the running task in grid.
+     * Moves the running task to the expected position in the carousel. In tablets, this minimize
+     * animation required to move the running task into focused task position.
      */
-    public void moveRunningTaskToFront() {
-        if (!mContainer.getDeviceProfile().isTablet) {
-            return;
-        }
-
+    public void moveRunningTaskToExpectedPosition() {
         TaskView runningTaskView = getRunningTaskView();
-        if (runningTaskView == null) {
+        if (runningTaskView == null || mCurrentPage != indexOfChild(runningTaskView)) {
             return;
         }
 
-        if (indexOfChild(runningTaskView) != mCurrentPage) {
-            return;
-        }
-
-        int frontIndex = enableLargeDesktopWindowingTile() ? getDesktopTaskViewCount() : 0;
-
-        if (mCurrentPage <= frontIndex) {
+        int runningTaskExpectedIndex = getRunningTaskExpectedIndex(runningTaskView);
+        if (mCurrentPage == runningTaskExpectedIndex) {
             return;
         }
 
@@ -1805,12 +1796,31 @@ public abstract class RecentsView<
         mMovingTaskView = null;
         runningTaskView.resetPersistentViewTransforms();
 
-        addView(runningTaskView, frontIndex);
-        setCurrentPage(frontIndex);
+        addView(runningTaskView, runningTaskExpectedIndex);
+        setCurrentPage(runningTaskExpectedIndex);
 
         updateTaskSize();
     }
 
+    private int getRunningTaskExpectedIndex(TaskView runningTaskView) {
+        if (mContainer.getDeviceProfile().isTablet) {
+            if (runningTaskView instanceof DesktopTaskView) {
+                return 0; // Desktop running task is always in front.
+            } else if (enableLargeDesktopWindowingTile()) {
+                return getDesktopTaskViewCount(); // Other running task is behind desktop tasks.
+            } else {
+                return 0;
+            }
+        } else {
+            int currentIndex = indexOfChild(runningTaskView);
+            if (currentIndex != -1) {
+                return currentIndex; // Keep the position if running task already in layout.
+            } else {
+                return 0; // New running task are added to the front to begin with.
+            }
+        }
+    }
+
     @Override
     protected void onScrollerAnimationAborted() {
         ActiveGestureProtoLogProxy.logOnScrollerAnimationAborted();
@@ -2980,7 +2990,7 @@ public abstract class RecentsView<
                 mTmpRunningTasks = new Task[]{runningTasks[0]};
                 taskView.bind(mTmpRunningTasks[0], mOrientationState, mTaskOverlayFactory);
             }
-            addView(taskView, 0);
+            addView(taskView, getRunningTaskExpectedIndex(taskView));
             runningTaskViewId = taskView.getTaskViewId();
             if (wasEmpty) {
                 addView(mClearAllButton);