create filegroup for update_device scripts.

The change was added to tm-mainline-prod in ag/23200961 with Merged-In
tag, so manually add the change needed to udc-dev.

Test: local OTA
Bug: 279622634
Change-Id: I4038d17c1253819f32fa9d50fe3a72b253b6c7eb
diff --git a/scripts/Android.bp b/scripts/Android.bp
index bbd3a4e..1e854a7 100644
--- a/scripts/Android.bp
+++ b/scripts/Android.bp
@@ -31,6 +31,14 @@
     default_applicable_licenses: ["system_update_engine_license"],
 }
 
+filegroup {
+    name: "update_device_script",
+    srcs: [
+        "**/*.py",
+    ],
+    path: ".",
+}
+
 python_library_host {
     name: "update_payload",