Hide global variables

* Move gBn/sConstructorMap into details
* Move gDefaultServiceManager[Lock] into details and delete them from Static.h

Test: pass
Test: boots
Bug: 36075507
Change-Id: Ief7938812efe4a9fdf1d7c09850512f19023185d
diff --git a/transport/include/hidl/HidlBinderSupport.h b/transport/include/hidl/HidlBinderSupport.h
index 8b98021..86ac74c 100644
--- a/transport/include/hidl/HidlBinderSupport.h
+++ b/transport/include/hidl/HidlBinderSupport.h
@@ -328,7 +328,7 @@
             // interfaceDescriptor fails
             return nullptr;
         }
-        auto func = gBnConstructorMap.get(myDescriptor, nullptr);
+        auto func = details::gBnConstructorMap.get(myDescriptor, nullptr);
         if (!func) {
             return nullptr;
         }