Touch Vertex AI test file to trigger tests

Author: andrewheard

FirebaseVertexAI/Tests/TestApp/Tests/Integration/IntegrationTests.swift

@@ -18,6 +18,8 @@ import FirebaseStorage
 import FirebaseVertexAI
 import XCTest
 
+// TODO(andrewheard): Remove this after testing on CI.
+
 @available(iOS 15.0, macOS 12.0, macCatalyst 15.0, tvOS 15.0, watchOS 8.0, *)
 final class IntegrationTests: XCTestCase {
   // Set temperature, topP and topK to lowest allowed values to make responses more deterministic.