Implement switchtoScreenshot recents callback

This lets the recents animation trigger a switchToScreenshot
to avoid premature live-tile disappearance.

Bug: 223321653
Test: put app in pip, open another app, go to recents, expand pip
Change-Id: I7ddcd891978fca7e91d7d90c1c8d9b824f5652a6

quickstep/src/com/android/quickstep/RecentsAnimationCallbacks.java

@@ -145,6 +145,18 @@ public class RecentsAnimationCallbacks implements
         });
     }
 
+    @BinderThread
+    @Override
+    public boolean onSwitchToScreenshot(Runnable onFinished) {
+        Utilities.postAsyncCallback(MAIN_EXECUTOR.getHandler(), () -> {
+            for (RecentsAnimationListener listener : getListeners()) {
+                if (listener.onSwitchToScreenshot(onFinished)) return;
+            }
+            onFinished.run();
+        });
+        return true;
+    }
+
     private final void onAnimationFinished(RecentsAnimationController controller) {
         Utilities.postAsyncCallback(MAIN_EXECUTOR.getHandler(), () -> {
             for (RecentsAnimationListener listener : getListeners()) {
@@ -180,5 +192,12 @@ public class RecentsAnimationCallbacks implements
          * Callback made when a task started from the recents is ready for an app transition.
          */
         default void onTasksAppeared(@NonNull RemoteAnimationTargetCompat[] appearedTaskTarget) {}
+
+        /**
+         * @return whether this will call onFinished or not (onFinished should only be called once).
+         */
+        default boolean onSwitchToScreenshot(Runnable onFinished) {
+            return false;
+        }
     }
 }

quickstep/src/com/android/quickstep/TaskAnimationManager.java

@@ -203,6 +203,24 @@ public class TaskAnimationManager implements RecentsAnimationCallbacks.RecentsAn
                     }
                 }
             }
+
+            @Override
+            public boolean onSwitchToScreenshot(Runnable onFinished) {
+                if (!ENABLE_QUICKSTEP_LIVE_TILE.get() || !activityInterface.isInLiveTileMode()
+                        || activityInterface.getCreatedActivity() == null) {
+                    // No need to switch since tile is already a screenshot.
+                    onFinished.run();
+                } else {
+                    final RecentsView recentsView =
+                            activityInterface.getCreatedActivity().getOverviewPanel();
+                    if (recentsView != null) {
+                        recentsView.switchToScreenshot(onFinished);
+                    } else {
+                        onFinished.run();
+                    }
+                }
+                return true;
+            }
         });
         final long eventTime = gestureState.getSwipeUpStartTimeMs();
         mCallbacks.addListener(gestureState);