HLE/Applets: Implemented a dummy Mii Selector applet.

This prevents some games (like Super Mario 3D Land) from freezing when trying to launch it, however, it's not complete and won't let you go past Mii selection as the parameter structure hasn't been reverse engineered yet.

src/core/hle/service/apt/apt.cpp

@@ -12,6 +12,7 @@
 #include "core/hle/service/apt/apt_a.h"
 #include "core/hle/service/apt/apt_s.h"
 #include "core/hle/service/apt/apt_u.h"
+#include "core/hle/service/fs/archive.h"
 
 #include "core/hle/hle.h"
 #include "core/hle/kernel/event.h"
@@ -380,6 +381,24 @@ void StartLibraryApplet(Service::Interface* self) {
     cmd_buff[1] = applet->Start(parameter).raw;
 }
 
+void GetAppletInfo(Service::Interface* self) {
+    u32* cmd_buff = Kernel::GetCommandBuffer();
+    auto app_id = static_cast<AppletId>(cmd_buff[1]);
+
+    if (auto applet = HLE::Applets::Applet::Get(app_id)) {
+        // TODO(Subv): Get the title id for the current applet and write it in the response[2-3]
+        cmd_buff[1] = RESULT_SUCCESS.raw;
+        cmd_buff[4] = static_cast<u32>(Service::FS::MediaType::NAND);
+        cmd_buff[5] = 1; // Registered
+        cmd_buff[6] = 1; // Loaded
+        cmd_buff[7] = 0; // Applet Attributes
+    } else {
+        cmd_buff[1] = ResultCode(ErrorDescription::NotFound, ErrorModule::Applet,
+                                 ErrorSummary::NotFound, ErrorLevel::Status).raw;
+    }
+    LOG_WARNING(Service_APT, "(stubbed) called appid=%u", app_id);
+}
+
 void Init() {
     AddService(new APT_A_Interface);
     AddService(new APT_S_Interface);

src/core/hle/service/apt/apt.h

@@ -54,7 +54,7 @@ enum class AppletId : u32 {
     Notifications      = 0x116,
     Miiverse           = 0x117,
     SoftwareKeyboard1  = 0x201,
-    Ed                 = 0x202,
+    Ed1                = 0x202,
     PnoteApp           = 0x204,
     SnoteApp           = 0x205,
     Error              = 0x206,
@@ -64,6 +64,7 @@ enum class AppletId : u32 {
     Application        = 0x300,
     AnyLibraryApplet   = 0x400,
     SoftwareKeyboard2  = 0x401,
+    Ed2                = 0x402,
 };
 
 /// Send a parameter to the currently-running application, which will read it via ReceiveParameter
@@ -132,6 +133,20 @@ void Enable(Service::Interface* self);
  */
 void GetAppletManInfo(Service::Interface* self);
 
+/**
+ * APT::GetAppletInfo service function.
+ *  Inputs:
+ *      1 : AppId
+ *  Outputs:
+ *      1 : Result of function, 0 on success, otherwise error code
+ *      2-3 : Title ID
+ *      4 : Media Type
+ *      5 : Registered
+ *      6 : Loaded
+ *      7 : Attributes
+ */
+void GetAppletInfo(Service::Interface* self);
+
 /**
  * APT::IsRegistered service function. This returns whether the specified AppID is registered with NS yet.
  * An AppID is "registered" once the process associated with the AppID uses APT:Enable. Home Menu uses this

src/core/hle/service/apt/apt_u.cpp

@@ -17,7 +17,7 @@ const Interface::FunctionInfo FunctionTable[] = {
     {0x00030040, Enable,                          "Enable"},
     {0x00040040, nullptr,                         "Finalize"},
     {0x00050040, GetAppletManInfo,                "GetAppletManInfo"},
-    {0x00060040, nullptr,                         "GetAppletInfo"},
+    {0x00060040, GetAppletInfo,                   "GetAppletInfo"},
     {0x00070000, nullptr,                         "GetLastSignaledAppletId"},
     {0x00080000, nullptr,                         "CountRegisteredApplet"},
     {0x00090040, IsRegistered,                    "IsRegistered"},