chore(python): Add google.geo.type as a proto-plus dependency for google/maps/routing/v2

PiperOrigin-RevId: 519870009
diff --git a/google/maps/routing/v2/BUILD.bazel b/google/maps/routing/v2/BUILD.bazel
index 8e7408c..0c14618 100644
--- a/google/maps/routing/v2/BUILD.bazel
+++ b/google/maps/routing/v2/BUILD.bazel
@@ -192,9 +192,17 @@
     "@com_google_googleapis_imports//:imports.bzl",
     "py_gapic_assembly_pkg",
     "py_gapic_library",
+    "py_import",
     "py_test",
 )
 
+py_import(
+    name="viewport",
+    srcs = [
+        "//google/geo/type:viewport_py_gapic",
+    ],
+)
+
 py_gapic_library(
     name = "routing_py_gapic",
     srcs = [":routing_proto"],
@@ -203,8 +211,11 @@
     service_yaml = "routes_v2.yaml",
     transport = "grpc+rest",
     deps = [
-        "//google/geo/type:viewport_py_proto",
+        ":viewport",
     ],
+    opt_args = [
+        "proto-plus-deps=google.geo.type",
+    ]
 )
 
 py_test(