firebase - Android 최신 버전 OREO에서 FCM 알림이 작동하지 않음

FCM 알림이 Android 최신 버전 OREO에서 작동하지 않습니다.

아래는 제 코드입니다 :

AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example">
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/luncher_logo"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/luncher_logo"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".WelcomeActivity">
            <intent-filter>
                <action android:name="com.example.action.MAIN" />
                <category android:name="com.example.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".MainActivity" />

        <service android:name=".firebase.MyFirebaseMessagingService">
            <intent-filter>
                <action android:name="com.google.firebase.MESSAGING_EVENT" />
            </intent-filter>
        </service>
        <service android:name=".firebase.FirebaseIDService">
            <intent-filter>
                <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
            </intent-filter>
        </service>
</manifest>