diff --git a/packages/Vcn/service-b/Android.bp b/packages/Vcn/service-b/Android.bp
index a462297..03ef4e6 100644
--- a/packages/Vcn/service-b/Android.bp
+++ b/packages/Vcn/service-b/Android.bp
@@ -19,6 +19,19 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
+filegroup {
+    name: "vcn-location-sources",
+    srcs: select(release_flag("RELEASE_MOVE_VCN_TO_MAINLINE"), {
+        true: [
+            "vcn-location-flag/module/com/android/server/vcn/VcnLocation.java",
+        ],
+        default: [
+            "vcn-location-flag/platform/com/android/server/vcn/VcnLocation.java",
+        ],
+    }),
+    visibility: ["//frameworks/base/services/core"],
+}
+
 java_library {
     name: "service-connectivity-b-pre-jarjar",
     sdk_version: "system_server_current",
diff --git a/packages/Vcn/service-b/vcn-location-flag/module/com/android/server/vcn/VcnLocation.java b/packages/Vcn/service-b/vcn-location-flag/module/com/android/server/vcn/VcnLocation.java
new file mode 100644
index 0000000..6c7d24d
--- /dev/null
+++ b/packages/Vcn/service-b/vcn-location-flag/module/com/android/server/vcn/VcnLocation.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.vcn;
+
+/**
+ * Class to represent that VCN is in a mainline module
+ *
+ * <p>This class is used to check whether VCN is in the non-updatable platform or in a mainline
+ * module.
+ */
+// When VCN is in a mainline module, this class (module/com/android/server/vcn/VcnLocation.java)
+// will be built in to the vcn-location-sources filegroup. When VCN is in the non-updatable
+// platform, platform/com/android/server/vcn/VcnLocation.java will be built in to the filegroup
+public class VcnLocation {
+    /** Indicate that VCN is the platform */
+    public static final boolean IS_VCN_IN_MAINLINE = true;
+}
diff --git a/packages/Vcn/service-b/vcn-location-flag/platform/com/android/server/vcn/VcnLocation.java b/packages/Vcn/service-b/vcn-location-flag/platform/com/android/server/vcn/VcnLocation.java
new file mode 100644
index 0000000..c6c82a5
--- /dev/null
+++ b/packages/Vcn/service-b/vcn-location-flag/platform/com/android/server/vcn/VcnLocation.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.vcn;
+
+/**
+ * Class to represent that VCN is in the platform
+ *
+ * <p>This class is used to check whether VCN is in the non-updatable platform or in a mainline
+ * module.
+ */
+// When VCN is in a mainline module, module/com/android/server/vcn/VcnLocation.java
+// will be built in to the vcn-location-sources filegroup. When VCN is in the non-updatable
+// platform, this class (platform/com/android/server/vcn/VcnLocation.java) will be built in to the
+// filegroup
+public class VcnLocation {
+    /** Indicate that VCN is the platform */
+    public static final boolean IS_VCN_IN_MAINLINE = false;
+}