Add some more logging for why a change might not be passed to Launcher

- The bug report in b/324435197 indicates that we are starting a recents
  transition, but the app going TO_BACK is not being passed to launcher.
  This CL adds a bit more logging to see if the task is incorrectly
  being considered as a non-leaf task, or something else.

Bug: 324435197
Test: Just adding logging
Change-Id: I9f692a49950cc859f0f7227b79c8e4c6ddbfeeb0

2 files changed, 12 insertions, 1 deletions

diff --git a/core/java/android/window/TransitionInfo.java b/core/java/android/window/TransitionInfo.java
index 15b9b788bca9..3685bbabf4d3 100644
--- a/core/java/android/window/TransitionInfo.java
+++ b/core/java/android/window/TransitionInfo.java
@@ -1021,6 +1021,10 @@ public final class TransitionInfo implements Parcelable {
                 sb.append(" component=");
                 sb.append(mActivityComponent.flattenToShortString());
             }
+            if (mTaskInfo != null) {
+                sb.append(" taskParent=");
+                sb.append(mTaskInfo.parentTaskId);
+            }
             sb.append('}');
             return sb.toString();
         }
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java b/libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java
index b5ea1b1b43ea..2f68145c08b7 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/recents/RecentsTransitionHandler.java
@@ -531,12 +531,18 @@ public class RecentsTransitionHandler implements Transitions.TransitionHandler {
                         // Put into the "below" layer space.
                         t.setLayer(change.getLeash(), layer);
                         mOpeningTasks.add(new TaskState(change, null /* leash */));
+                    } else {
+                        ProtoLog.v(ShellProtoLogGroup.WM_SHELL_RECENTS_TRANSITION,
+                                "  unhandled root taskId=%d", taskInfo.taskId);
                     }
                 } else if (TransitionUtil.isDividerBar(change)) {
                     final RemoteAnimationTarget target = TransitionUtil.newTarget(change,
                             belowLayers - i, info, t, mLeashMap);
                     // Add this as a app and we will separate them on launcher side by window type.
                     apps.add(target);
+                } else {
+                    ProtoLog.v(ShellProtoLogGroup.WM_SHELL_RECENTS_TRANSITION,
+                            "  unhandled change taskId=%d", taskInfo.taskId);
                 }
             }
             t.apply();
@@ -545,7 +551,8 @@ public class RecentsTransitionHandler implements Transitions.TransitionHandler {
                     mRecentTasksController.getSplitBoundsForTaskId(closingSplitTaskId));
             try {
                 ProtoLog.v(ShellProtoLogGroup.WM_SHELL_RECENTS_TRANSITION,
-                        "[%d] RecentsController.start: calling onAnimationStart", mInstanceId);
+                        "[%d] RecentsController.start: calling onAnimationStart with %d apps",
+                        mInstanceId, apps.size());
                 mListener.onAnimationStart(this,
                         apps.toArray(new RemoteAnimationTarget[apps.size()]),
                         wallpapers.toArray(new RemoteAnimationTarget[wallpapers.size()]),