Add test on CI.

ci/builders/linux_unopt.json

@@ -40,6 +40,10 @@
                     "name": "test:format_and_dart_test",
                     "script": "flutter/ci/format.sh"
                 },
+                {
+                    "nane": "test:GeneratedPluginRegistant.java omitted",
+                    "script": "flutter/ci/test/format_no_generated_java.sh"
+                },
                 {
                     "language": "python3",
                     "name": "test: Host_Tests_for_host_debug_unopt",