Fix strictmode error logs due to task snapshot hw buffer not being closed

- Wrapping the buffer into a bitmap will add a reference so we can
  close the buffer once we convert the TaskSnapshot into a
  ThumbnailData
- Also probably shouldn't be creating a new ThumbnailData for each
  local task stack listener (most of whom don't actually handle this
  method)

Fixes: 165825625
Test: Check logs
Change-Id: I4d881721692a960ac40be848e49188afddbbc9c3

packages/SystemUI/shared/src/com/android/systemui/shared/recents/model/ThumbnailData.java

@@ -62,16 +62,15 @@ public class ThumbnailData {
     }
 
     private static Bitmap makeThumbnail(TaskSnapshot snapshot) {
-        final HardwareBuffer buffer = snapshot.getHardwareBuffer();
         Bitmap thumbnail = null;
-        try {
+        try (final HardwareBuffer buffer = snapshot.getHardwareBuffer()) {
             if (buffer != null) {
                 thumbnail = Bitmap.wrapHardwareBuffer(buffer, snapshot.getColorSpace());
             }
         } catch (IllegalArgumentException ex) {
             // TODO(b/157562905): Workaround for a crash when we get a snapshot without this state
             Log.e("ThumbnailData", "Unexpected snapshot without USAGE_GPU_SAMPLED_IMAGE: "
-                    + buffer, ex);
+                    + snapshot.getHardwareBuffer(), ex);
         }
         if (thumbnail == null) {
             Point taskSize = snapshot.getTaskSize();

packages/SystemUI/shared/src/com/android/systemui/shared/system/TaskStackChangeListeners.java

@@ -292,9 +292,10 @@ public class TaskStackChangeListeners {
                     }
                     case ON_TASK_SNAPSHOT_CHANGED: {
                         Trace.beginSection("onTaskSnapshotChanged");
+                        final TaskSnapshot snapshot = (TaskSnapshot) msg.obj;
+                        final ThumbnailData thumbnail = new ThumbnailData(snapshot);
                         for (int i = mTaskStackListeners.size() - 1; i >= 0; i--) {
-                            mTaskStackListeners.get(i).onTaskSnapshotChanged(msg.arg1,
-                                    new ThumbnailData((TaskSnapshot) msg.obj));
+                            mTaskStackListeners.get(i).onTaskSnapshotChanged(msg.arg1, thumbnail);
                         }
                         Trace.endSection();
                         break;