Application startup time not reported when initializing FIrebaseApp manually

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

- Android Studio version: Android Studio Electric Eel | 2022.1.1 Patch 2
- Firebase Component: Performance
- Component version: 20.3.1

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

Since version 20.3.1 it seems that Firebase Performance does not report the application startup time if Firebase is manually initialized.
Probably due to this check in `FirebasePerfEarly`:
https://github.com/firebase/firebase-android-sdk/blob/02b336526b53672f8216211d79de162cf857c81c/firebase-perf/src/main/java/com/google/firebase/perf/FirebasePerfEarly.java#L48

As StartupTime is not initialized if Firebase is manually instantiated
https://github.com/firebase/firebase-android-sdk/blob/02b336526b53672f8216211d79de162cf857c81c/firebase-common/src/main/java/com/google/firebase/FirebaseApp.java#L432

#### Steps to reproduce:

Disable `FirebaseInitProvider` and initialize Firebase in code with `FirebaseApp#initializeApp(context)`, the App startup time won't be reported on Firebase Dashboard