App Module build gradle for React Native Notifications

build.gradle

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.facebook.react:react-native:+'
    
    //Add these lines
    implementation "com.google.android.gms:play-services-base:15.0.0"
    implementation "com.google.firebase:firebase-core:15.0.2"
    implementation "com.google.firebase:firebase-messaging:15.0.2"
}

//Put this on bottom of file
apply plugin: 'com.google.gms.google-services'