Record isFinal for parameters into summaries.

pkg/analyzer/lib/src/summary/idl.dart

Index: pkg/analyzer/lib/src/summary/idl.dart
diff --git a/pkg/analyzer/lib/src/summary/idl.dart b/pkg/analyzer/lib/src/summary/idl.dart
index 0c8314de8f4b0bc0de656c1933bb22ef46521131..0d8ce5edf4da47104e807b1c8fbeeb588df7142b 100644
--- a/pkg/analyzer/lib/src/summary/idl.dart
+++ b/pkg/analyzer/lib/src/summary/idl.dart
@@ -2568,6 +2568,12 @@ abstract class UnlinkedParam extends base.SummaryClass {
   bool get isExplicitlyCovariant;
 
   /**
+   * Indicates whether the parameter is declared using the `final` keyword.
+   */
+  @Id(16)
+  bool get isFinal;
+
+  /**
    * Indicates whether this is a function-typed parameter.
    */
   @Id(5)