applets/swkbd: Fix text check message encoding

The text check message can be encoded in UTF-8.

src/core/hle/service/am/applets/applet_software_keyboard.cpp

@@ -278,13 +278,21 @@ void SoftwareKeyboard::ProcessTextCheck() {
 
     std::memcpy(&swkbd_text_check, text_check_data.data(), sizeof(SwkbdTextCheck));
 
-    std::u16string text_check_message =
-        swkbd_text_check.text_check_result == SwkbdTextCheckResult::Failure ||
-                swkbd_text_check.text_check_result == SwkbdTextCheckResult::Confirm
-            ? Common::UTF16StringFromFixedZeroTerminatedBuffer(
-                  swkbd_text_check.text_check_message.data(),
-                  swkbd_text_check.text_check_message.size())
-            : u"";
+    std::u16string text_check_message = [this, &swkbd_text_check]() -> std::u16string {
+        if (swkbd_text_check.text_check_result == SwkbdTextCheckResult::Failure ||
+            swkbd_text_check.text_check_result == SwkbdTextCheckResult::Confirm) {
+            return swkbd_config_common.use_utf8
+                       ? Common::UTF8ToUTF16(Common::StringFromFixedZeroTerminatedBuffer(
+                             reinterpret_cast<const char*>(
+                                 swkbd_text_check.text_check_message.data()),
+                             swkbd_text_check.text_check_message.size() * sizeof(char16_t)))
+                       : Common::UTF16StringFromFixedZeroTerminatedBuffer(
+                             swkbd_text_check.text_check_message.data(),
+                             swkbd_text_check.text_check_message.size());
+        } else {
+            return u"";
+        }
+    }();
 
     LOG_INFO(Service_AM, "\nTextCheckResult: {}\nTextCheckMessage: {}",
              GetTextCheckResultName(swkbd_text_check.text_check_result),