Enable //third_party/tensorflow/python/kernel_tests:variables_test_tfrt test

PiperOrigin-RevId: 315977755
Change-Id: If1cf01e367fd2fe7f04ded600c730932a48baee7

tensorflow/python/kernel_tests/BUILD

@@ -1440,6 +1440,7 @@ tf_py_test(
     size = "small",
     srcs = ["variables_test.py"],
     tags = ["no_windows"],  # b/133869052
+    tfrt_enabled = True,
     deps = [
         "//tensorflow/python:array_ops",
         "//tensorflow/python:client_testlib",

tensorflow/python/kernel_tests/variables_test.py

@@ -174,6 +174,7 @@ class VariablesTestCase(test.TestCase, parameterized.TestCase):
                                    "Shapes.*and.*are incompatible"):
         var.assign(np.zeros(shape=[2, 2]))
 
+  @test_util.disable_tfrt("Graph is not supported yet. b/156187905")
   @test_util.run_in_graph_and_eager_modes
   def testAssignDifferentShapesAllowed(self):
     var = variables.Variable(np.zeros(shape=[1, 1]),
@@ -183,6 +184,8 @@ class VariablesTestCase(test.TestCase, parameterized.TestCase):
     self.evaluate(var.assign(np.zeros(shape=[2, 2])))
     self.assertAllEqual(np.zeros(shape=[2, 2]), var.read_value())
 
+  @test_util.disable_tfrt("GetHostSize() is not expected to be called with "
+                          "string type. b/156761465")
   def testZeroSizeStringAssign(self):
     with self.cached_session() as sess:
       array = variables.VariableV1(