Merge "Remove activity from stopping list when removed from display"

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

@@ -3222,6 +3222,7 @@ final class ActivityRecord extends WindowToken implements WindowManagerService.A
         getDisplayContent().mUnknownAppVisibilityController.appRemovedOrHidden(this);
         mWmService.mTaskSnapshotController.onAppRemoved(this);
         mStackSupervisor.getActivityMetricsLogger().notifyActivityRemoved(this);
+        mStackSupervisor.mStoppingActivities.remove(this);
         waitingToShow = false;
 
         // TODO(b/169035022): move to a more-appropriate place.

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

@@ -207,7 +207,7 @@ class WindowOrganizerController extends IWindowOrganizerController.Stub
                         final Map.Entry<IBinder, WindowContainerTransaction.Change> entry =
                                 entries.next();
                         final WindowContainer wc = WindowContainer.fromBinder(entry.getKey());
-                        if (!wc.isAttached()) {
+                        if (wc == null || !wc.isAttached()) {
                             Slog.e(TAG, "Attempt to operate on detached container: " + wc);
                             continue;
                         }