rejoin confrence When not kill process and exit application, the video is black.

[AU4U]

1. join a conference.
2. Press desconnnect button.
3. Press cack button at Login Layout . exit the app.
4. Enter again.
5. Press connect button, rejoin conference. the screen is black. 100% reproduction. in XiaoMi Mix2 Android version 8.0.0

[WenyuanWu99]

It seems that some resources were taken. You can solve this by add below in src/sample/conference/src/main/java/owt/sample/conference/MainActivity.java

    @Override
    protected void onDestroy() {
        super.onDestroy();
        
        System.exit(0);
    }

use System.exit(0); to release resources.

[raviteja74]

Duplicate of #232