Add null check before applying fullscreen params

Bug: 159026796
Change-Id: I5c1a0ca26c8e4a187e2217870b27289ecf18238e
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
index 3b1210e..f2e4127 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskView.java
@@ -975,6 +975,9 @@
     }
 
     void updateCurrentFullscreenParams(PreviewPositionHelper previewPositionHelper) {
+        if (getRecentsView() == null) {
+            return;
+        }
         mCurrentFullscreenParams.setProgress(
                 mFullscreenProgress,
                 getRecentsView().getScaleX(),