[XAM] Implementation of: Profile Manager & Profiles Support

Thanks Emoose for Account Encrypt/Decrypt code!

src/xenia/vfs/devices/stfs_xbox.h

@@ -340,7 +340,8 @@ struct XContentMetadata {
   } description_ex_raw;
 
   std::u16string display_name(XLanguage language) const {
-    uint32_t lang_id = uint32_t(language) - 1;
+    uint32_t lang_id =
+        language == XLanguage::kInvalid ? 1 : uint32_t(language) - 1;
 
     if (lang_id >= kNumLanguagesV2) {
       assert_always();

src/xenia/vfs/devices/xcontent_container_device.h

@@ -53,6 +53,8 @@ class XContentContainerDevice : public Device {
     return files_total_size_ - sizeof(XContentContainerHeader);
   }
 
+  uint64_t xuid() const { return header_->content_metadata.profile_id; }
+
   uint32_t title_id() const {
     return header_->content_metadata.execution_info.title_id;
   }