Skip default animation of embedded activity for scene transition

If the app specifies makeSceneTransitionAnimation. The animation
should be handled by itself.

Bug: 283213473
Test: On device which supports embedded activity:
      Open Settings, search, click back arrow to leave search.
      It should run a fade animation by ExitTransitionCoordinator
      instead of with an additional slide animation.
Change-Id: Ie056da5711c4bc04bf5ccfd1fe12c181daa956c2

libs/WindowManager/Shell/src/com/android/wm/shell/activityembedding/ActivityEmbeddingController.java

@@ -16,6 +16,7 @@
 
 package com.android.wm.shell.activityembedding;
 
+import static android.app.ActivityOptions.ANIM_SCENE_TRANSITION;
 import static android.window.TransitionInfo.FLAG_FILLS_TASK;
 import static android.window.TransitionInfo.FLAG_IN_TASK_WITH_EMBEDDED_ACTIVITY;
 
@@ -111,6 +112,11 @@ public class ActivityEmbeddingController implements Transitions.TransitionHandle
         if (containsNonEmbeddedChange && !handleNonEmbeddedChanges(changes)) {
             return false;
         }
+        final TransitionInfo.AnimationOptions options = info.getAnimationOptions();
+        if (options != null && options.getType() == ANIM_SCENE_TRANSITION) {
+            // Scene-transition will be handled by app side.
+            return false;
+        }
 
         // Start ActivityEmbedding animation.
         mTransitionCallbacks.put(transition, finishCallback);