Update interop matrix with Java v1.27.1

tools/interop_matrix/client_matrix.py

@@ -213,6 +213,7 @@ LANG_RELEASE_MATRIX = {
             ('v1.24.0', ReleaseInfo()),
             ('v1.25.0', ReleaseInfo()),
             ('v1.26.1', ReleaseInfo()),
+            ('v1.27.1', ReleaseInfo()),
         ]),
     'python':
         OrderedDict([