Fix NPE caught in FallbackRecentsTest

Change-Id: Ia586bebd9a24e5bbfcbed50c7c260134911e073b
Fixes: 128464669
Test: N/A
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
index 2583ffb..252a957 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/RecentsView.java
@@ -1578,7 +1578,9 @@
     }
 
     public void updateLiveTileIcon(Drawable icon) {
-        mLiveTileOverlay.setIcon(icon);
+        if (mLiveTileOverlay != null) {
+            mLiveTileOverlay.setIcon(icon);
+        }
     }
 
     public void finishRecentsAnimation(boolean toRecents, Runnable onFinishComplete) {