Check for `POST_NOTIFICATIONS` permission

package com.android.vending.licensing;

import android.Manifest;

import android.app.Notification;

import android.app.NotificationChannel;

import android.app.NotificationManager;

import android.content.Context;

import android.content.Intent;

import android.content.SharedPreferences;

import android.content.pm.PackageManager;

import android.os.Build;

import android.util.Log;

import androidx.annotation.CallSuper;

import androidx.core.app.ActivityCompat;

import androidx.core.app.NotificationCompat;

import androidx.core.app.NotificationManagerCompat;

            .build();

        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);

        if (ActivityCompat.checkSelfPermission(context, Manifest.permission.POST_NOTIFICATIONS) ==

            PackageManager.PERMISSION_GRANTED) {

            notificationManager.notify(callerUid, notification);

        }

    }

    private void registerNotificationChannel() {