Add greyed out available tiles once they are added to the current grid

Available tiles shows every tiles. Added tiles are greyed out and can't be interacted with until they are removed from the current grid

Test: manually
Test: EditModeTest
Flag: com.android.systemui.qs_ui_refactor_compose_fragment
Fixes: 396690775
Change-Id: I6aaddec033ffd87a2df29303adc3c0461947892d