Hang up does not work

[s681562]

Describe the bug
FlutterIncomingCall.endAllCalls();
FlutterIncomingCall.endCall(...);

These functions are not canceling current (income) call.
The connection is still going, the phone call is still going.

To Reproduce
Call your phone or take a call with your phone.
Use FlutterIncomingCall.endAllCalls(); or FlutterIncomingCall.endCall(...);
Nothing is happen, the call is not finishing by FlutterIncomingCall code.

Expected behavior
Immediately stop the phone call programmatically.

Screenshots
nothing to show

Please complete the following information:

• Device: Samsung
• OS: android 11
• dart 2.16
• flutter 2.8

Additional context
Add any other context about the problem here.

I worked under Android native. Hang up a current phone call is working well by this code below.
My code in android java. Please fix your flutter plugin.

@RequiresApi(api = Build.VERSION_CODES.P)
public static void hangup(Context context) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
        TelecomManager tcm = (TelecomManager) context.getSystemService(Context.TELECOM_SERVICE);
        if (tcm != null) {
            try {
                if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ANSWER_PHONE_CALLS)
                        != PackageManager.PERMISSION_GRANTED) {
                    return;
                }

                tcm.endCall();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
    else {
        Class classTelephony = null;
        try {
            TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            classTelephony = Class.forName(telephonyManager.getClass().getName());
            Method methodGetITelephony = classTelephony.getDeclaredMethod("getITelephony");
            methodGetITelephony.setAccessible(true);
            Object telephonyInterface = methodGetITelephony.invoke(telephonyManager);
            Class telephonyInterfaceClass = Class.forName(telephonyInterface.getClass().getName());
            Method methodEndCall = telephonyInterfaceClass.getDeclaredMethod("endCall");
            methodEndCall.invoke(telephonyInterface);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }
}