Fix black screen while animating a closing and changing TF

A TaskFragment could be resizing to a smaller bounds while changing
to be invisible. A black screen was shown during the transition.
So, skip unfreeze surface in that case.

Also union the staring bounds to the whole closing screen bounds,
or the leash will be cropped by the target screen bounds.

Bug: 267044260
Test: steps on the bug

Change-Id: Ia037c5beaca12695fc6c00e38c454cb6dced1b33
Merged-In: Ia037c5beaca12695fc6c00e38c454cb6dced1b33

libs/WindowManager/Jetpack/src/androidx/window/extensions/embedding/TaskFragmentAnimationRunner.java

@@ -215,6 +215,8 @@ class TaskFragmentAnimationRunner extends IRemoteAnimationRunner.Stub {
             } else {
                 closingTargets.add(target);
                 closingWholeScreenBounds.union(target.screenSpaceBounds);
+                // Union the start bounds since this may be the ClosingChanging animation.
+                closingWholeScreenBounds.union(target.startBounds);
             }
         }
 

services/core/java/com/android/server/wm/TaskFragment.java

@@ -2498,13 +2498,18 @@ class TaskFragment extends WindowContainer<WindowContainer> {
         }
     }
 
-    /** Records the starting bounds of the closing organized TaskFragment. */
-    void setClosingChangingStartBoundsIfNeeded() {
+    /**
+     * Returns {@code true} if the starting bounds of the closing organized TaskFragment is
+     * recorded. Otherwise, return {@code false}.
+     */
+    boolean setClosingChangingStartBoundsIfNeeded() {
         if (isOrganizedTaskFragment() && mDisplayContent != null
                 && mDisplayContent.mChangingContainers.remove(this)) {
             mDisplayContent.mClosingChangingContainers.put(
                     this, new Rect(mSurfaceFreezer.mFreezeBounds));
+            return true;
         }
+        return false;
     }
 
     @Override

services/core/java/com/android/server/wm/WindowContainer.java

@@ -1299,14 +1299,18 @@ class WindowContainer<E extends WindowContainer> extends ConfigurationContainer<
         // If we are losing visibility, then a snapshot isn't necessary and we are no-longer
         // part of a change transition.
         if (!visible) {
+            boolean skipUnfreeze = false;
             if (asTaskFragment() != null) {
                 // If the organized TaskFragment is closing while resizing, we want to keep track of
                 // its starting bounds to make sure the animation starts at the correct position.
                 // This should be called before unfreeze() because we record the starting bounds
                 // in SurfaceFreezer.
-                asTaskFragment().setClosingChangingStartBoundsIfNeeded();
+                skipUnfreeze = asTaskFragment().setClosingChangingStartBoundsIfNeeded();
+            }
+
+            if (!skipUnfreeze) {
+                mSurfaceFreezer.unfreeze(getSyncTransaction());
             }
-            mSurfaceFreezer.unfreeze(getSyncTransaction());
         }
         WindowContainer parent = getParent();
         if (parent != null) {