[Dual Shade] Show qs panel when adjust brightness for desktop.

Added a config `config_useBrightnessMirrorInOverlay`, which will
be overriden to false in the next cl for desktop.

See the screenrecord of this change:
https://drive.google.com/file/d/1A6iuziPF1XzLk5Ui6V8N7OxTX69PegJ6/view?usp=sharing

Bug: 436930908
Flag: com.android.systemui.scene_container
Test: Manually.
Change-Id: I8015a5a73839e739a49faaf85f884172e7e34f8e