[CS] Move EmergencyGestureModule to top-level modules not CSModule.

While `CentralSurfacesModule` *looks* like it should include all the
classes that CentralSurfaces depends on, it turns out that's not
actually the case. As long as the top-level module has those classes,
everything compiles.

This helps keep `CentralSurfacesModule` focused on just @Providing
CentralSurfaces and nothing else.

Bug: 277764509
Test: SysUI, SysUIGoogle, and SysUIGo compile
Flag: EXEMPT refactor
Change-Id: Iba9850441761db3c0ed88edee2b5e50de533453b