No-op an unused API for Shell Transitions

Another api was added to RecentsAnimationController but this doesn't
have a use in Shell Transitions. It was causing a crash though, so
override it to be a no-op.

Bug: 183993924
Test: open app, go to recents, go back, observe no crash
Change-Id: I3ece5b927c8c7d27252f185ed421112fea5f12c1

packages/SystemUI/shared/src/com/android/systemui/shared/system/RemoteTransitionCompat.java

@@ -337,6 +337,12 @@ public class RemoteTransitionCompat implements Parcelable {
                 Log.e(TAG, "Failed to detach the navigation bar from app", e);
             }
         }
+
+        /**
+         * @see IRecentsAnimationController#animateNavigationBarToApp(long)
+         */
+        @Override public void animateNavigationBarToApp(long duration) {
+        }
     }