Merge "Cleanup flag "add_black_background_for_window_..."" into main

        }

        // Set the surface of the SurfaceView to black to avoid users seeing the contents below the

        // magnifier when the mirrored surface has an alpha less than 1.

        if (Flags.addBlackBackgroundForWindowMagnifier()) {

        mTransaction.setColor(mMirrorSurfaceView.getSurfaceControl(), COLOR_BLACK_ARRAY);

        }

        mTransaction.show(mMirrorSurface)

                .reparent(mMirrorSurface, mMirrorSurfaceView.getSurfaceControl());

        modifyWindowMagnification(false);