Make more use of generated code in Java analysis server.

pkg/analysis_server/tool/spec/codegen_analysis_server.dart

Index: pkg/analysis_server/tool/spec/codegen_analysis_server.dart
diff --git a/pkg/analysis_server/tool/spec/codegen_analysis_server.dart b/pkg/analysis_server/tool/spec/codegen_analysis_server.dart
index 8e8a763102875478b47bb5a031d381a8676bf6fe..4cd81a993a5612aad61bec0dc9ec12f8bb8d332e 100644
--- a/pkg/analysis_server/tool/spec/codegen_analysis_server.dart
+++ b/pkg/analysis_server/tool/spec/codegen_analysis_server.dart
@@ -19,6 +19,8 @@ class CodegenAnalysisServer extends CodegenJavaVisitor {
     outputHeader(javaStyle: true);
     writeln('package com.google.dart.server;');
     writeln();
+    writeln('import com.google.dart.server.generated.types.*;');
+    writeln();
     writeln('import java.util.List;');
     writeln('import java.util.Map;');
     writeln();