Stub ldr:ro IRoInterface

Some games initialise this service on startup however don't actually use it. Add a simple stub to allow such games to boot.

app/CMakeLists.txt

@@ -288,6 +288,7 @@ add_library(skyline SHARED
         ${source_DIR}/skyline/services/bt/IBluetoothUser.cpp
         ${source_DIR}/skyline/services/btm/IBtmUser.cpp
         ${source_DIR}/skyline/services/btm/IBtmUserCore.cpp
+        ${source_DIR}/skyline/services/ro/IRoInterface.cpp
         ${source_DIR}/skyline/applet/applet_creator.cpp
         ${source_DIR}/skyline/applet/controller_applet.cpp
         ${source_DIR}/skyline/applet/error_applet.cpp

app/src/main/cpp/skyline/services/ro/IRoInterface.cpp

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: MPL-2.0
+// Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
+
+#include "IRoInterface.h"
+
+namespace skyline::service::ro {
+    IRoInterface::IRoInterface(const DeviceState &state, ServiceManager &manager) : BaseService(state, manager) {}
+}

app/src/main/cpp/skyline/services/ro/IRoInterface.h

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: MPL-2.0
+// Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
+
+#pragma once
+
+#include <services/serviceman.h>
+
+namespace skyline::service::ro {
+    /**
+     * @brief IRoInterface or ldr:ro is used by applications to dynamically load nros
+     * @url https://switchbrew.org/wiki/RO_services#LoadModule
+     */
+    class IRoInterface : public BaseService {
+      public:
+        IRoInterface(const DeviceState &state, ServiceManager &manager);
+    };
+}

app/src/main/cpp/skyline/services/serviceman.cpp

@@ -47,6 +47,7 @@
 #include "mmnv/IRequest.h"
 #include "bt/IBluetoothUser.h"
 #include "btm/IBtmUser.h"
+#include "ro/IRoInterface.h"
 #include "serviceman.h"
 
 #define SERVICE_CASE(class, name, ...) \
@@ -121,6 +122,7 @@ namespace skyline::service {
             SERVICE_CASE(bt::IBluetoothUser, "bt")
             SERVICE_CASE(btm::IBtmUser, "btm:u")
             SERVICE_CASE(nim::IShopServiceAccessServerInterface, "nim:eca")
+            SERVICE_CASE(ro::IRoInterface, "ldr:ro")
             default:
                 std::string_view nameString(span(reinterpret_cast<char *>(&name), sizeof(name)).as_string(true));
                 throw std::out_of_range(fmt::format("CreateService called with an unknown service name: {}", nameString));