Add version restriction

Author: cherylEnkidu

Sources/Internal/Logger/DataConnectLogger.swift

@@ -14,6 +14,7 @@
 
 import OSLog
 
+@available(iOS 15.0, macOS 12.0, tvOS 15.0, watchOS 8.0, *)
 class DataConnectLogger {
   private static let logger = Logger(
     subsystem: "com.google.firebase",