Firebase Auth Emulator interferes with Firebase Storage

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### [REQUIRED] Step 2: Describe your environment

* Operating System version: Windows 11
* Firebase SDK version: ____
* Library version: 9.1.1
* Firebase Product: auth, storage

### [REQUIRED] Step 3: Describe the problem

We access the Auth and Storage services in our project using this Java Admin SDK.
Recently, we wanted to make use of the Auth Emulator for development purposes. However, after enabling the emulator by setting the `FIREBASE_AUTH_EMULATOR_HOST` environment variable, the Storage calls stop working and return 401 Unauthorized.

It seems that by setting the `FIREBASE_AUTH_EMULATOR_HOST` environment variable, the [whole project enters an emulator mode](https://github.com/firebase/firebase-admin-java/blob/e8ec68c97929972acdbe05b79b5ea18f077a08a2/src/main/java/com/google/firebase/auth/internal/Utils.java#L27) and [uses emulator credentials](https://github.com/firebase/firebase-admin-java/blob/master/src/main/java/com/google/firebase/ImplFirebaseTrampolines.java#L47). The emulator credentials should be made to only apply to Auth calls.

Furthermore, I could not even find a way to create two instances of FirebaseApps (one with the emulator enabled and one disabled), since the check for `FIREBASE_AUTH_EMULATOR_HOST` is static and shared program-wide.

#### Steps to reproduce:

Use Auth and Storage in a production project. Enable `FIREBASE_AUTH_EMULATOR_HOST` and Storage stops working.

Bắt đầu bằng cách đọc src/main/java/com/google/firebase/auth/internal/Utils.java và src/main/java/com/google/firebase/ImplFirebaseTrampolines.java, đặc biệt là phần xử lý FIREBASE_AUTH_EMULATOR_HOST và thông tin xác thực của emulator. Tái hiện sự cố khi Auth và Storage được bật cùng nhau, sau đó xác minh rằng các lệnh gọi đến Storage vẫn được cấp quyền trong khi thông tin xác thực của emulator chỉ được áp dụng cho Auth; đồng thời kiểm tra xem các thực thể FirebaseApp riêng biệt có thể khác nhau về cấu hình emulator hay không.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.