Fix quick switch in between two split pairs crash

Launcher always receive recent animatino start callback before
onStageTaskChanged callback, which result to not able to identify the
correct animate targets to animate. Update to fetch animate target from
wrapped remote animation target directly.

Fix: 236226779
Test: quick in between two split pairs won't crash
Change-Id: Ic10db086256b4a1ed53e5a3becb6fa9114df74ec

quickstep/src/com/android/quickstep/AbsSwipeUpHandler.java

@@ -876,7 +876,7 @@ public abstract class AbsSwipeUpHandler<T extends StatefulActivity<S>,
         if (DesktopTaskView.DESKTOP_MODE_SUPPORTED && targets.hasDesktopTasks()) {
             mRemoteTargetHandles = mTargetGluer.assignTargetsForDesktop(targets);
         } else {
-            mRemoteTargetHandles = mTargetGluer.assignTargetsForSplitScreen(mContext, targets);
+            mRemoteTargetHandles = mTargetGluer.assignTargetsForSplitScreen(targets);
         }
         mRecentsAnimationController = controller;
         mRecentsAnimationTargets = targets;