Using both firebase-remote-config and firebase-analytics on the same project throws Error: Uncaught (in promise): Firebase app already exists

[mic345]

Describe the bug

Using both firebase-remote-config and firebase-analytics on the same project throws core.js:4197 ERROR Error: Uncaught (in promise): Firebase app already exists.

This happens due to both modules require the call to their initializeFirebase respectively and both functions rejects if window.firebase is already initialized. Note that if you do not call those functions, the services are not operational due to the firebase service member not being set (this.analyticsRef and this.remoteConfigRef).

To Reproduce

1. Create a vanilla project.
2. Add both @capacitor-community/firebase-analytics and @capacitor-community/firebase-remote-config.
3. Add an ionic service for each of the services.
4. On each of the services call initializeFirebase

Expected behavior

Support using both @capacitor-community/firebase-analytics and @capacitor-community/firebase-remote-config on the same project.

Additional context

Ionic:

Ionic CLI : 6.11.8 (/home/vagrant/.config/yarn/global/node_modules/@ionic/cli)
Ionic Framework : @ionic/angular 5.4.2
@angular-devkit/build-angular : 0.1000.8
@angular-devkit/schematics : 10.0.8
@angular/cli : 10.0.8
@ionic/angular-toolkit : 2.3.3

Capacitor:

Capacitor CLI : 2.4.2
@capacitor/core : 2.4.2

Utility:

cordova-res : not installed
native-run (update available: 1.2.2) : 1.2.1

System:

NodeJS : v12.18.3 (/home/vagrant/.nvm/versions/node/v12.18.3/bin/node)
npm : 6.14.6
OS : Linux 4.9