Fix issues where the task was still touchable in overview

- Reparent above the top window as an activity can have multiple windows
- Fix ordering when reparenting tasks into the temporary split container
  to match the previous ordering since the input consumer is layered
  above the top window

Fixes: 197571005
Fixes: 195958376
Test: Launch maps > share place > enter overview
      Enable stage split > split > enter overview
Change-Id: I84899e71f079f001eef737217897642460f5832b

libs/WindowManager/Shell/src/com/android/wm/shell/splitscreen/SplitScreenController.java

@@ -67,6 +67,8 @@ import com.android.wm.shell.transition.LegacyTransitions;
 import com.android.wm.shell.transition.Transitions;
 
 import java.io.PrintWriter;
+import java.util.Arrays;
+import java.util.Comparator;
 import java.util.concurrent.Executor;
 
 /**
@@ -295,11 +297,15 @@ public class SplitScreenController implements DragAndDropPolicy.Starter,
         mRootTDAOrganizer.attachToDisplayArea(DEFAULT_DISPLAY, builder);
         SurfaceControl sc = builder.build();
         SurfaceControl.Transaction transaction = new SurfaceControl.Transaction();
+
+        // Ensure that we order these in the parent in the right z-order as their previous order
+        Arrays.sort(apps, (a1, a2) -> a1.prefixOrderIndex - a2.prefixOrderIndex);
+        int layer = 1;
         for (RemoteAnimationTarget appTarget : apps) {
-            // TODO(b/195958376) set the correct layer/z-order in transaction for the new surface
             transaction.reparent(appTarget.leash, sc);
             transaction.setPosition(appTarget.leash, appTarget.screenSpaceBounds.left,
                     appTarget.screenSpaceBounds.top);
+            transaction.setLayer(appTarget.leash, layer++);
         }
         transaction.apply();
         transaction.close();

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

@@ -582,7 +582,7 @@ final class InputMonitor {
                 if (recentsAnimationController.updateInputConsumerForApp(
                         mRecentsAnimationInputConsumer.mWindowHandle)) {
                     mRecentsAnimationInputConsumer.show(mInputTransaction,
-                            recentsAnimationController.getHighestLayerActivity());
+                            recentsAnimationController.getHighestLayerWindow());
                     mAddRecentsAnimationInputConsumerHandle = false;
                 }
             }

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

@@ -1103,9 +1103,9 @@ public class RecentsAnimationController implements DeathRecipient {
     }
 
     /**
-     * Returns the activity with the highest layer, or null if none is found.
+     * Returns the window with the highest layer, or null if none is found.
      */
-    public ActivityRecord getHighestLayerActivity() {
+    public WindowState getHighestLayerWindow() {
         int highestLayer = Integer.MIN_VALUE;
         Task highestLayerTask = null;
         for (int i = mPendingAnimations.size() - 1; i >= 0; i--) {
@@ -1116,7 +1116,7 @@ public class RecentsAnimationController implements DeathRecipient {
                 highestLayerTask = adapter.mTask;
             }
         }
-        return highestLayerTask.getTopMostActivity();
+        return highestLayerTask.getTopMostActivity().getTopChild();
     }
 
     boolean isAnimatingTask(Task task) {