Provide app-process tokens to remote transitions so they can be boosted

The app process token is required for shell to request delegated
transition animators to be boosted.

Bug: 183993977
Test: add logging in WPC.setRunningRemoteAnimation and verify calls
      during transitions
Change-Id: Ide2dd3e77714cca8e85e409c8d88c69c20122827

quickstep/src/com/android/quickstep/util/SplitSelectStateController.java

@@ -89,7 +89,8 @@ public class SplitSelectStateController {
                     new RemoteSplitLaunchTransitionRunner(task1, task2);
             mSystemUiProxy.startTasks(taskIds[0], null /* mainOptions */, taskIds[1],
                     null /* sideOptions */, STAGE_POSITION_BOTTOM_OR_RIGHT,
-                    new RemoteTransitionCompat(animationRunner, MAIN_EXECUTOR));
+                    new RemoteTransitionCompat(animationRunner, MAIN_EXECUTOR,
+                            ActivityThread.currentActivityThread().getApplicationThread()));
         } else {
             RemoteSplitLaunchAnimationRunner animationRunner =
                     new RemoteSplitLaunchAnimationRunner(task1, task2, callback);