Support `atest update_engine_unittests`. am: 9456b6fa14
am: ffb7595386

Change-Id: I0cef1a7e5b853591e335eb5d0b351d55443c00be
diff --git a/Android.bp b/Android.bp
index 9e8296b..a72cf50 100644
--- a/Android.bp
+++ b/Android.bp
@@ -731,3 +731,12 @@
         },
     },
 }
+
+// AIDL interface between libupdate_engine and the Things jar.
+filegroup {
+    name: "things_update_engine_aidl",
+    srcs: [
+        "binder_bindings/android/brillo/IUpdateEngine.aidl",
+        "binder_bindings/android/brillo/IUpdateEngineStatusCallback.aidl",
+    ],
+}