Prepo: Fix SaveSystemReport* IPC definitions (#4278)

* Prepo: Fix SaveSystemReport IPC definitions

* Follow original code

* Fix args index in HipcGenerator

* Addresses feedback

* oops

Ryujinx.Horizon/Sdk/Ncm/ApplicationId.cs

@@ -0,0 +1,52 @@
+namespace Ryujinx.Horizon.Sdk.Ncm
+{
+    readonly struct ApplicationId
+    {
+        public readonly ulong Id;
+
+        public static int Length => sizeof(ulong);
+
+        public static ApplicationId First => new(0x0100000000010000);
+
+        public static ApplicationId Last => new(0x01FFFFFFFFFFFFFF);
+
+        public static ApplicationId Invalid => new(0);
+
+        public bool IsValid => Id >= First.Id && Id <= Last.Id;
+
+        public ApplicationId(ulong id)
+        {
+            Id = id;
+        }
+
+        public override bool Equals(object obj)
+        {
+            return obj is ApplicationId applicationId && applicationId.Equals(this);
+        }
+
+        public bool Equals(ApplicationId other)
+        {
+            return other.Id == Id;
+        }
+
+        public override int GetHashCode()
+        {
+            return Id.GetHashCode();
+        }
+
+        public static bool operator ==(ApplicationId lhs, ApplicationId rhs)
+        {
+            return lhs.Equals(rhs);
+        }
+
+        public static bool operator !=(ApplicationId lhs, ApplicationId rhs)
+        {
+            return !lhs.Equals(rhs);
+        }
+
+        public override string ToString()
+        {
+            return $"0x{Id:x}";
+        }
+    }
+}