Preserve existing behavior in non-tcore builds

Keep the ecore_animator_frametime_get() based refresh rate query in
non-tcore builds and use the fixed 60Hz fallback only when built with
use_tcore. Restore the unhandled key log in TextInputChannel, document
the native handle type for both window backends, and drop a leftover
unused include.

Author: JSUYA

flutter/shell/platform/tizen/channels/text_input_channel.cc

@@ -335,6 +335,7 @@ bool TextInputChannel::HandleKey(const char* key,
     return true;
 #endif
   } else {
+    FT_LOG(Info) << "Key[" << key << "] is unhandled.";
     return false;
   }
 

flutter/shell/platform/tizen/flutter_tizen_display_monitor.cc

@@ -3,6 +3,9 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#ifndef USE_TCORE_WL
+#include <Ecore.h>
+#endif
 #include <system_info.h>
 
 #include "flutter/shell/platform/tizen/flutter_tizen_display_monitor.h"
@@ -28,11 +31,20 @@ void FlutterTizenDisplayMonitor::UpdateDisplays() {
   display.display_id = 0;
   display.single_display = true;
 
-  // TODO(jsuya): Default to 60Hz refresh rate. The previous implementation
-  // used ecore_animator_frametime_get(), which is no longer available after
-  // dropping the Ecore dependency. Replace this once tizen-core (or another
-  // public Tizen API) exposes a way to query the display refresh rate.
+#ifdef USE_TCORE_WL
+  // TODO(jsuya): Default to 60Hz refresh rate. ecore_animator_frametime_get()
+  // is not available without the Ecore dependency. Replace this once
+  // tizen-core (or another public Tizen API) exposes a way to query the
+  // display refresh rate.
   display.refresh_rate = 60.0;
+#else
+  double fps = ecore_animator_frametime_get();
+  if (fps <= 0.0) {
+    display.refresh_rate = 0.0;
+  } else {
+    display.refresh_rate = 1 / fps;
+  }
+#endif
 
   int32_t width = 0, height = 0, dpi = 0;
   FlutterTizenView* view = engine_->view();

flutter/shell/platform/tizen/public/flutter_tizen.h

@@ -206,7 +206,8 @@ FLUTTER_EXPORT void FlutterDesktopViewDestroy(FlutterDesktopViewRef view);
 // Returns a native UI toolkit handle for manipulation in host application.
 //
 // Cast the returned void*
-// - window ecore wl2   : to tizen_core_wl_window_h
+// - window ecore wl2   : to Ecore_Wl2_Window*
+// - window tcore wl    : to tizen_core_wl_window_h (when built with use_tcore)
 // @warning This API is a work-in-progress and may change.
 FLUTTER_EXPORT void* FlutterDesktopViewGetNativeHandle(
     FlutterDesktopViewRef view);

flutter/shell/platform/tizen/tizen_event_loop.h

@@ -15,7 +15,6 @@
 #include <memory>
 #include <mutex>
 #include <queue>
-#include <set>
 #include <thread>
 
 #include "flutter/shell/platform/embedder/embedder.h"