Implement optional dumping of NPDRM isos (PBP demos) on game startup

Core/FileSystems/ISOFileSystem.h

@@ -57,6 +57,7 @@ public:
 	bool ComputeRecursiveDirSizeIfFast(const std::string &path, int64_t *size) override { return false; }
 	void Describe(char *buf, size_t size) const override { snprintf(buf, size, "ISO"); }  // TODO: Ask the fileLoader about the origins
 
+	std::shared_ptr<BlockDevice> GetBlockDevice() override { return blockDevice; }
 private:
 	struct TreeEntry {
 		~TreeEntry();
@@ -166,6 +167,7 @@ public:
 	bool ComputeRecursiveDirSizeIfFast(const std::string &path, int64_t *size) override { return false; }
 
 	void Describe(char *buf, size_t size) const override { snprintf(buf, size, "ISOBlock"); }
+	std::shared_ptr<BlockDevice> GetBlockDevice() { return isoFileSystem_->GetBlockDevice(); }
 
 private:
 	std::shared_ptr<IFileSystem> isoFileSystem_;