Add if let bundleID check and remove duplicated code

Author: andrewheard

FirebaseAI/Sources/GenerativeAIService.swift

@@ -179,7 +179,9 @@ struct GenerativeAIService {
     } else {
       urlRequest.setValue(firebaseInfo.apiKey, forHTTPHeaderField: "x-goog-api-key")
     }
-    urlRequest.setValue(Bundle.main.bundleIdentifier, forHTTPHeaderField: "x-ios-bundle-identifier")
+    if let bundleID = Bundle.main.bundleIdentifier {
+      urlRequest.setValue(bundleID, forHTTPHeaderField: "x-ios-bundle-identifier")
+    }
     urlRequest.setValue(
       "\(GenerativeAIService.languageTag) \(GenerativeAIService.firebaseVersionTag)",
       forHTTPHeaderField: "x-goog-api-client"
@@ -212,10 +214,6 @@ struct GenerativeAIService {
       }
     }
 
-    if let bundleID = Bundle.main.bundleIdentifier {
-      urlRequest.setValue(bundleID, forHTTPHeaderField: "x-ios-bundle-identifier")
-    }
-
     let encoder = JSONEncoder()
     urlRequest.httpBody = try encoder.encode(request)
     urlRequest.timeoutInterval = request.options.timeout

FirebaseAI/Sources/Types/Internal/Live/LiveSessionService.swift

@@ -365,7 +365,9 @@ actor LiveSessionService {
     var urlRequest = URLRequest(url: url)
     urlRequest.timeoutInterval = requestOptions.timeout
     urlRequest.setValue(firebaseInfo.apiKey, forHTTPHeaderField: "x-goog-api-key")
-    urlRequest.setValue(Bundle.main.bundleIdentifier, forHTTPHeaderField: "x-ios-bundle-identifier")
+    if let bundleID = Bundle.main.bundleIdentifier {
+      urlRequest.setValue(bundleID, forHTTPHeaderField: "x-ios-bundle-identifier")
+    }
     urlRequest.setValue(
       "\(GenerativeAIService.languageTag) \(GenerativeAIService.firebaseVersionTag)",
       forHTTPHeaderField: "x-goog-api-client"