Agora Video crash app and freez IOS build

### Version of the agora_rtc_engine

6.5.3

### Platforms affected

- [ ] Android
- [x] iOS
- [ ] macOS
- [ ] Windows
- [ ] Web

### Steps to reproduce

Call this function in IOS Devices
AgoraVideoView(
controller: VideoViewController(
rtcEngine: engine,
canvas: const VideoCanvas(uid: 3, renderMode: RenderModeType.renderModeHidden),
),
);

### Expected results

i check in Iphone 16 IOS 26.0.2 it should show local video inside live video

### Actual results

For now when call above function it cause memory issues and Flutter ios app freez

DartWorker: EXC_BAD_ACCESS (code=1, address=0x0)

### Code sample

Code sample

```dart
AgoraVideoView(
controller: VideoViewController(
rtcEngine: engine,
canvas: const VideoCanvas(uid: 3, renderMode: RenderModeType.renderModeHidden),
),
);
```

### Screenshots or Video

Screenshots / Video demonstration

[Upload media here]

### Logs

Logs

```console
<<<< FigXPCUtilities >>>> signalled err=-17281 at <>:299
<<<< FigCaptureSourceRemote >>>> Fig assert: "err == 0 " at bail (FigCaptureSourceRemote.m:569) - (err=-17281)
ERROR AppleProResHW: 45: AppleProResHW_CheckPlatform(): IOServiceGetMatchingService failed

```
DartWorker: EXC_BAD_ACCESS (code=1, address=0x0)

### Flutter Doctor output

Doctor output

```console
[✓] Flutter (Channel stable, 3.35.5, on macOS 26.0.1 25A362 darwin-arm64, locale
en-EG)
[✓] Android toolchain - develop for Android devices (Android SDK version 36.1.0)
[✓] Xcode - develop for iOS and macOS (Xcode 26.0)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2025.1)
[✓] VS Code (version 1.104.3)
[✓] Connected device (4 available)
[✓] Network resources

```