Restore public api

Author: paulb777

FirebaseRemoteConfig/SwiftNew/RemoteConfigUpdate.swift

@@ -21,4 +21,8 @@ public class RemoteConfigUpdate: NSObject {
   @objc public init(updatedKeys: Set<String>) {
     self.updatedKeys = updatedKeys
   }
+
+  @objc override public convenience init() {
+    self.init(updatedKeys: Set<String>())
+  }
 }

FirebaseRemoteConfig/Tests/Swift/SwiftAPI/FirebaseRemoteConfigSwift_APIBuildTests.swift

@@ -107,7 +107,7 @@ final class FirebaseRemoteConfig_APIBuildTests: XCTestCase {
     settings.fetchTimeout = TimeInterval(100)
 
     // TODO(ncooke3): This should probably not be initializable.
-    let update = FirebaseRemoteConfig.RemoteConfigUpdate(updatedKeys: Set<String>())
+    let update = FirebaseRemoteConfig.RemoteConfigUpdate()
     let _: Set<String> = update.updatedKeys
 
     let _ = FirebaseRemoteConfig.RemoteConfig.remoteConfig()