fix: Escape "Google" as a keyword.

Author: robertvoinescu-work

Google.Api.Generator.Utils/Roslyn/Keywords.cs

@@ -97,7 +97,13 @@ public static class Keywords
             "virtual",
             "void",
             "volatile",
-            "while"
+            "while",
+
+            // Not actually keywords, but represent special reserved names in the generated libraries that should be escaped like keywords.
+            "Google",    
+            "google",
+            "Service",
+            "service"
             );
 
         public static string PrependAtIfKeyword(string word) => IsKeyword(word) ? $"@{word}" : word;