[Launcher Jank] Add TODO for LauncherPreviewRenderer to set bg handler on smartspace BaseTemplateCard

Fix: 347775522
Flag: NONE - performance change
Test: manual
Change-Id: I19ba67e1eabfe02c45909d85d723bc28a78ae6df
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index ae8f1d5..6088941 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -508,6 +508,7 @@
                 && !SHOULD_SHOW_FIRST_PAGE_WIDGET) {
             CellLayout firstScreen = mWorkspaceScreens.get(FIRST_SCREEN_ID);
             View qsb = mHomeElementInflater.inflate(R.layout.qsb_preview, firstScreen, false);
+            // TODO: set bgHandler on qsb when it is BaseTemplateCard, which requires API changes.
             CellLayoutLayoutParams lp = new CellLayoutLayoutParams(
                     0, 0, firstScreen.getCountX(), 1);
             lp.canReorder = false;