flutter集成appsflyer

用的appsflyer_sdk：appsflyer_sdk，
按照文档安装好，

#afDevKey在appsflyer后台，创建好应用可见，appid从应用商店复制
final AppsFlyerOptions options = AppsFlyerOptions(afDevKey: 'xxxxxxxx', appId: 'xxxxxxxxx', timeToWaitForATTUserAuthorization: 15, showDebug: true);

AppsflyerSdk sdk = AppsflyerSdk(options);

sdk.initSdk(
    registerConversionDataCallback: true,
    registerOnAppOpenAttributionCallback: true,
    registerOnDeepLinkingCallback: true
);

sdk().logEvent('test_name', {'test_key':'test_value'});