message: Walked up tree to find SceneView
  Don't want to reference an Activity inside a View
diff: @@ -4,6 +4,7 @@ import android.app.Activity;
  import android.content.Context;
  import android.os.Build;
  import android.view.View;
  +import android.view.ViewParent;
  import android.view.ViewTreeObserver;
  import android.widget.FrameLayout;
  @@ -55,10 +56,12 @@ public class SharedElementView extends FrameLayout {
  @Override
  protected void onAttachedToWindow() {
  super.onAttachedToWindow();
  - Activity activity = ((ThemedReactContext) getContext()).getCurrentActivity();
  - if (!(activity instanceof SceneActivity))
  + ViewParent ancestor = getParent();
  + while (ancestor != null && !(ancestor instanceof SceneView))
  + ancestor = ancestor.getParent();
  + if (ancestor == null)
  return;
  - scene = ((SceneActivity) activity).scene;
  + scene = (SceneView) ancestor;
  View sharedElement = getChildAt(0);
  if (!scene.sharedElements.contains(sharedElement)) {
  setTransitionName(sharedElement, name);
  