Adopt existing namespaces into OpenRCT2 namespace (#22368)

* Put all of TitleSequenceManager into the same namespace

* Move RideConstructionState into the OpenRCT2 namespace

* Adopt existing namespaces into OpenRCT2 namespace

This adds `using namespace OpenRCT2` to compilation units where appropriate,
as a means to get the codebase to compile until these units have been placed
in a namespace of their own.

src/openrct2/core/ZipAndroid.cpp

@@ -136,7 +136,7 @@ public:
     }
 };
 
-namespace Zip
+namespace OpenRCT2::Zip
 {
     std::unique_ptr<IZipArchive> Open(std::string_view path, ZIP_ACCESS access)
     {
@@ -155,7 +155,7 @@ namespace Zip
         }
         return result;
     }
-} // namespace Zip
+} // namespace OpenRCT2::Zip
 
 extern "C" {
 JNIEXPORT jlong JNICALL Java_io_openrct2_ZipArchive_allocBytes(JNIEnv* env, jclass, jbyteArray input, jint numBytes);