Links the specified FirebaseProject with an existing Google Analytics account. Using this call, you can either: - Specify an analyticsAccountId to provision a new Google Analytics property within the specified account and associate the new property with the FirebaseProject. - Specify an existing analyticsPropertyId to associate the property with the FirebaseProject. Note that when you call AddGoogleAnalytics: 1. The first check determines if any existing data streams in the Google Analytics property correspond to any existing Firebase Apps in the FirebaseProject (based on the packageName or bundleId associated with the data stream). Then, as applicable, the data streams and apps are linked. Note that this auto-linking only applies to AndroidApps and IosApps. 2. If no corresponding data streams are found for the Firebase Apps, new data streams are provisioned in the Google Analytics property for each of the Firebase Apps. Note that a new data stream is always provisioned for a Web App even if it was previously associated with a data stream in the Analytics property. Learn more about the hierarchy and structure of Google Analytics accounts in the Analytics documentation. The result of this call is an Operation. Poll the Operation to track the provisioning process by calling GetOperation until done is true. When done is true, the Operation has either succeeded or failed. If the Operation succeeded, its response is set to an AnalyticsDetails; if the Operation failed, its error is set to a google.rpc.Status. To call AddGoogleAnalytics, a project member must be an Owner for the existing FirebaseProject and have the Edit permission for the Google Analytics account. If the FirebaseProject already has Google Analytics enabled, and you call AddGoogleAnalytics using an analyticsPropertyId that's different from the currently associated property, then the call will fail. Analytics may have already been enabled in the Firebase console or by specifying timeZone and regionCode in the call to AddFirebase.