Correct parameter order when calling setCustomAnimation.

Only affect predict-back animation.

Bug: 259427810
Test: manual, call overrideActivityTransition for close transition,
verify when predict-back animation happen, the exit animation is apply
to the exit activity.
Test: atest ActivityTransitionTests BackNavigationControllerTests\
CustomizeActivityAnimationTest

Change-Id: I5ddfc6e674deb7b3bfcd7365d525ec6d03c525ac

services/core/java/com/android/server/wm/BackNavigationController.java

@@ -286,8 +286,8 @@ class BackNavigationController {
                                 currentActivity.getCustomAnimation(false/* open */);
                         if (customAppTransition != null) {
                             infoBuilder.setCustomAnimation(currentActivity.packageName,
-                                    customAppTransition.mExitAnim,
                                     customAppTransition.mEnterAnim,
+                                    customAppTransition.mExitAnim,
                                     customAppTransition.mBackgroundColor);
                         }
                     }