Allow touches outside QS customizer

The user needs to be able to touch the nav bar or
status bar in order to close the QS customization
screen.

Fixes: 347165317
Test: manual - Touch/swipe outside the QS tile editor
Flag: com.android.systemui.migrate_clocks_to_blueprint
Change-Id: Ia170e0353e8ad12258a95f3888b65402710d2f02