Fix crash when showing error dialog in NetworkRequestDialogActivity

import android.os.Bundle;

import android.os.Handler;

import android.os.HandlerExecutor;

import android.os.Looper;

import android.os.Message;

import android.widget.Toast;

import androidx.annotation.Nullable;

import androidx.annotation.VisibleForTesting;

import androidx.fragment.app.FragmentActivity;

import androidx.fragment.app.FragmentManager;

import com.android.settings.R;

import com.android.settings.wifi.NetworkRequestErrorDialogFragment.ERROR_DIALOG_TYPE;

        super.onPause();

    }

    private final Handler mHandler = new Handler() {

    private final Handler mHandler = new Handler(Looper.getMainLooper()) {

        @Override

        public void handleMessage(Message msg) {

            switch (msg.what) {

        dismissDialogs();

        // Throws error dialog.

        final FragmentManager fragmentManager = getSupportFragmentManager();

        if (fragmentManager.isDestroyed() || fragmentManager.isStateSaved()) {

            return;

        }

        final NetworkRequestErrorDialogFragment dialogFragment =

                NetworkRequestErrorDialogFragment.newInstance();

        dialogFragment.setRejectCallback(mUserSelectionCallback);

        final Bundle bundle = new Bundle();

        bundle.putSerializable(NetworkRequestErrorDialogFragment.DIALOG_TYPE, type);

        dialogFragment.setArguments(bundle);

        dialogFragment.show(getSupportFragmentManager(), TAG);

        dialogFragment.show(fragmentManager, TAG);

        mShowingErrorDialog = true;

    }