Include 'fixedId' key when printing service ids

runtime/vm/debugger_test.cc

Index: runtime/vm/debugger_test.cc
diff --git a/runtime/vm/debugger_test.cc b/runtime/vm/debugger_test.cc
index 0cda54908160c83fda36d7ab94a3514755f003af..8b537d76d8e09e0e0fd170ed4fc29b56fbf787c6 100644
--- a/runtime/vm/debugger_test.cc
+++ b/runtime/vm/debugger_test.cc
@@ -69,17 +69,17 @@ TEST_CASE(Debugger_PrintBreakpointsToJSONArray) {
     }
     ExpectSubstringF(
         js.ToCString(),
-        "[{\"type\":\"Breakpoint\",\"id\":\"breakpoints\\/2\","
+        "[{\"type\":\"Breakpoint\",\"fixedId\":true,\"id\":\"breakpoints\\/2\","
         "\"breakpointNumber\":2,\"resolved\":false,"
         "\"location\":{\"type\":\"Location\","
-        "\"script\":{\"type\":\"@Script\","
+        "\"script\":{\"type\":\"@Script\",\"fixedId\":true,"
         "\"id\":\"libraries\\/%" Pd "\\/scripts\\/test-lib\","
         "\"uri\":\"test-lib\","
         "\"kind\":\"script\"},\"tokenPos\":14}},"
-        "{\"type\":\"Breakpoint\",\"id\":\"breakpoints\\/1\","
+        "{\"type\":\"Breakpoint\",\"fixedId\":true,\"id\":\"breakpoints\\/1\","
         "\"breakpointNumber\":1,\"resolved\":false,"
         "\"location\":{\"type\":\"Location\","
-        "\"script\":{\"type\":\"@Script\","
+        "\"script\":{\"type\":\"@Script\",\"fixedId\":true,"
         "\"id\":\"libraries\\/%" Pd "\\/scripts\\/test-lib\","
         "\"uri\":\"test-lib\","
         "\"kind\":\"script\"},\"tokenPos\":5}}]",