[Solución] Android 8.0 Only fullscreen opaque activities can request orientation

Util.java

@SuppressLint("SourceLockedOrientationActivity")
	public static void chequeaVersion(Activity activity){
      //Verifica si es diferente de android O 
		if (android.os.Build.VERSION.SDK_INT != Build.VERSION_CODES.O){
			activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
			Log.d("TAG", "No es android O");
		}else{
			activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
      Log.d("TAG", "Es android O");
		}
	}