[XLA] Unbreak the OSS build

PiperOrigin-RevId: 312440902
Change-Id: I7dc3514e5612dd054cdef30990eede7a16d5d68a

tensorflow/compiler/xla/service/BUILD

@@ -4498,6 +4498,7 @@ cc_library(
         "//tensorflow/compiler/xla:xla_data_proto_cc",
         "//tensorflow/core:lib",
         "//tensorflow/core:regexp_internal",
+        "@com_google_absl//absl/base",
         "@com_google_absl//absl/strings",
         "@com_google_absl//absl/types:optional",
     ],

tensorflow/compiler/xla/service/hlo_lexer.cc

@@ -17,6 +17,7 @@ limitations under the License.
 
 #include <unordered_map>
 
+#include "absl/base/casts.h"
 #include "absl/strings/ascii.h"
 #include "absl/strings/escaping.h"
 #include "absl/strings/numbers.h"