Cannot set user id and user property at the same time

### Version info

**Angular:** 12.2.0

**Firebase:** 9.6.6

**AngularFire:** 7.2.1

### Expected behavior

I need to set user id and a user property after a user has logged in. User property is product_amount, and the user belongs to different audiences based on the product_amount.

### Actual behavior

Every user is counted to belong to two audiences. After user has logged in, I set `this.analytics.setUserId(id);`, which causes product_amount to be zero. After user id is set, I set user properties with
```
this.analytics.setUserProperties(
{ product_amount: this.product_amount },
{ global: true }
);
```
which logs the real product amount.

It is not possible to set user id and user properties at the same time. That means initial user property is always the wrong one.

首先，使用 Angular 12.2.0、Firebase 9.6.6 和 AngularFire 7.2.1，透過 setUserId 和 setUserProperties 設定 product_amount 屬性來重現問題。檢查 AngularFire 的 analytics 進入點和 Firebase Analytics 的行為，以判斷為什麼設定 ID 會重設該屬性；當兩個值都維持正確且受眾指派準確時，即表示完成。

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