Clean-up Acts headers

The Acts public header directories contained dozens of header files that should be private.

The header files for Gaudi/Athena components (algorithms, tools, services and converters) should ALWAYS reside in the src directory alongside their implementation (.cxx) files. Clients of tools and services should include a pure virtual interface header, of the public interface the component implements, which can be in the public include directory of the package, or in a dedicated interface library package.

Tracking/Acts/FaserActsGeometry/FaserActsGeometry/FaserActsDetectorElement.h

@@ -24,7 +24,7 @@ namespace Acts {
   class SurfaceBounds;
 }
 
-class FaserActsTrackingGeometrySvc;
+class IFaserActsTrackingGeometrySvc;
 class FaserActsAlignmentStore;
 
 class IdentityHelper;
@@ -87,7 +87,7 @@ private:
   mutable std::mutex m_cacheMutex;
   mutable std::shared_ptr<const Acts::Transform3> m_defTransform;
 
-  const FaserActsTrackingGeometrySvc* m_trackingGeometrySvc;
+  const IFaserActsTrackingGeometrySvc* m_trackingGeometrySvc;
   
   Identifier m_explicitIdentifier;