[acc, ldn] Impliment CreateClientProcessMonitor and stub LoadIdTokenCache changes

- Impliment CreateClientProcessMonitor to ldn:s and ldn:u
- IManagerForApplication/SystemService: from 19.0.0+ LoadIdTokenCache (3) is now LoadIdTokenCacheDeprecated (3)
- IManagerForApplication/SystemService: LoadIdTokenCache (4) stubbed

Thanks to SwitchBrew documentation, aims to fix 'Pokemon: Legends Z-A' LDN issues.

src/core/hle/service/acc/acc.cpp

@@ -84,7 +84,8 @@ public:
             {0, D<&IManagerForSystemService::CheckAvailability>, "CheckAvailability"},
             {1, D<&IManagerForSystemService::GetAccountId>, "GetAccountId"},
             {2, nullptr, "EnsureIdTokenCacheAsync"},
-            {3, nullptr, "LoadIdTokenCache"},
+            {3, D<&IManagerForSystemService::LoadIdTokenCacheDeprecated>, "LoadIdTokenCacheDeprecated"}, // 19.0.0+
+            {4, D<&IManagerForSystemService::LoadIdTokenCache>, "LoadIdTokenCache"}, // 19.0.0+
             {100, nullptr, "SetSystemProgramIdentification"},
             {101, nullptr, "RefreshNotificationTokenAsync"}, // 7.0.0+
             {110, nullptr, "GetServiceEntryRequirementCache"}, // 4.0.0+
@@ -126,6 +127,16 @@ private:
         R_SUCCEED();
     }
 
+    Result LoadIdTokenCacheDeprecated() {
+        LOG_WARNING(Service_ACC, "(STUBBED) called");
+        R_SUCCEED();
+    }
+
+    Result LoadIdTokenCache() {
+        LOG_WARNING(Service_ACC, "(STUBBED) called");
+        R_SUCCEED();
+    }
+
     Result GetNetworkServiceLicenseCacheEx() {
         LOG_DEBUG(Service_ACC, "(STUBBED) called.");
 
@@ -647,7 +658,7 @@ public:
             {0, &IManagerForApplication::CheckAvailability, "CheckAvailability"},
             {1, &IManagerForApplication::GetAccountId, "GetAccountId"},
             {2, &IManagerForApplication::EnsureIdTokenCacheAsync, "EnsureIdTokenCacheAsync"},
-            {3, &IManagerForApplication::LoadIdTokenCacheDeprecated, "LoadIdTokenCache"},
+            {3, &IManagerForApplication::LoadIdTokenCacheDeprecated, "LoadIdTokenCacheDeprecated"},
             {4, &IManagerForApplication::LoadIdTokenCache, "LoadIdTokenCache"},
             {130, &IManagerForApplication::GetNintendoAccountUserResourceCacheForApplication, "GetNintendoAccountUserResourceCacheForApplication"},
             {136, &IManagerForApplication::GetNintendoAccountUserResourceCacheForApplication, "GetNintendoAccountUserResourceCache"}, // 19.0.0+

src/core/hle/service/ldn/ldn.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -40,7 +43,7 @@ public:
         // clang-format off
         static const FunctionInfo functions[] = {
             {0, C<&ISystemServiceCreator::CreateSystemLocalCommunicationService>, "CreateSystemLocalCommunicationService"},
-            {1, nullptr, "CreateClientProcessMonitor"} // 18.0.0+
+            {1, C<&ISystemServiceCreator::CreateClientProcessMonitor>, "CreateClientProcessMonitor"} // 18.0.0+
         };
         // clang-format on
 
@@ -55,6 +58,14 @@ private:
         *out_interface = std::make_shared<ISystemLocalCommunicationService>(system);
         R_SUCCEED();
     }
+
+    Result CreateClientProcessMonitor(
+        OutInterface<IClientProcessMonitor> out_interface) {
+        LOG_DEBUG(Service_LDN, "called");
+
+        *out_interface = std::make_shared<IClientProcessMonitor>(system);
+        R_SUCCEED();
+    }
 };
 
 class IUserServiceCreator final : public ServiceFramework<IUserServiceCreator> {
@@ -63,7 +74,7 @@ public:
         // clang-format off
         static const FunctionInfo functions[] = {
             {0, C<&IUserServiceCreator::CreateUserLocalCommunicationService>, "CreateUserLocalCommunicationService"},
-            {1, nullptr, "CreateClientProcessMonitor"} // 18.0.0+
+            {1, C<&IUserServiceCreator::CreateClientProcessMonitor>, "CreateClientProcessMonitor"} // 18.0.0+
         };
         // clang-format on
 
@@ -78,6 +89,14 @@ private:
         *out_interface = std::make_shared<IUserLocalCommunicationService>(system);
         R_SUCCEED();
     }
+
+    Result CreateClientProcessMonitor(
+        OutInterface<IClientProcessMonitor> out_interface) {
+        LOG_DEBUG(Service_LDN, "called");
+
+        *out_interface = std::make_shared<IClientProcessMonitor>(system);
+        R_SUCCEED();
+    }
 };
 
 class ISfServiceCreator final : public ServiceFramework<ISfServiceCreator> {