Add overlayble.xml to enable RRO

Test: Flashed and confirmed RRO works w/ ag/17060836
Fix: 222379102

Change-Id: If218691fab1d8cd4e6e3d6cc16ec3b1c515b0326
diff --git a/nearby/halfsheet/res/values/overlayable.xml b/nearby/halfsheet/res/values/overlayable.xml
new file mode 100644
index 0000000..fffa2e3
--- /dev/null
+++ b/nearby/halfsheet/res/values/overlayable.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 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.
+  -->
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <overlayable name="NearbyHalfSheetResourcesConfig">
+        <policy type="product|system|vendor">
+            <item type="color" name="fast_pair_half_sheet_background"/>
+            <item type="color" name="fast_pair_half_sheet_button_color"/>
+        </policy>
+    </overlayable>
+</resources>
\ No newline at end of file