Fix tcore clipboard data length handling

Author: JSUYA

flutter/shell/platform/tizen/tizen_clipboard.cc

@@ -4,6 +4,7 @@
 
 #include "tizen_clipboard.h"
 
+#include <cstring>
 #include <unistd.h>
 
 #include "flutter/shell/platform/tizen/logger.h"
@@ -141,15 +142,8 @@ void TizenClipboard::ReceiveData(void* event) {
     return;
   }
 
-  size_t data_length = strlen(data);
-  size_t buffer_size = len;
-  std::string content;
-
-  if (data_length < buffer_size) {
-    content.append(data, data_length);
-  } else {
-    content.append(data, buffer_size);
-  }
+  size_t data_length = strnlen(data, static_cast<size_t>(len));
+  std::string content(data, data_length);
 
   if (on_data_callback_) {
     on_data_callback_(content);

flutter/shell/platform/tizen/tizen_event_loop.h

@@ -14,6 +14,7 @@
 #include <functional>
 #include <mutex>
 #include <queue>
+#include <set>
 #include <thread>
 
 #include "flutter/shell/platform/embedder/embedder.h"