[automerge] Add leash check in PipTaskOrganizer#fadeExistingPip 2p: 4353053c87

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16719697

Bug: 197319184
Change-Id: I08c012637e1e7c38c579bec2175d69e4cf4e63a6

libs/WindowManager/Shell/src/com/android/wm/shell/pip/PipTaskOrganizer.java

@@ -825,6 +825,10 @@ public class PipTaskOrganizer implements ShellTaskOrganizer.TaskListener,
     }
 
     private void fadeExistingPip(boolean show) {
+        if (mLeash == null || !mLeash.isValid()) {
+            Log.w(TAG, "Invalid leash on fadeExistingPip: " + mLeash);
+            return;
+        }
         final float alphaStart = show ? 0 : 1;
         final float alphaEnd = show ? 1 : 0;
         mPipAnimationController