Merge "Do not create extend surface for transfer starting window change." into tm-qpr-dev

    private void edgeExtendWindow(TransitionInfo.Change change,

            Animation a, SurfaceControl.Transaction startTransaction,

            SurfaceControl.Transaction finishTransaction) {

        // Do not create edge extension surface for transfer starting window change.

        // The app surface could be empty thus nothing can draw on the hardware renderer, which will

        // block this thread when calling Surface#unlockCanvasAndPost.

        if ((change.getFlags() & FLAG_STARTING_WINDOW_TRANSFER_RECIPIENT) != 0) {

            return;

        }

        final Transformation transformationAtStart = new Transformation();

        a.getTransformationAt(0, transformationAtStart);

        final Transformation transformationAtEnd = new Transformation();