Moving product specific strings to res-product

In the future, product specific strings need to be put in res-product.

Bug: 253772249
Test: Make Settings
Change-Id: Ie777975ec8e379dee8fdbb5444c09a40f5f9f1d4
diff --git a/Android.bp b/Android.bp
index f803eb1..1acba28 100644
--- a/Android.bp
+++ b/Android.bp
@@ -55,7 +55,7 @@
     ],
 
     srcs: ["src/**/*.java", "src/**/*.kt"],
-
+    resource_dirs: ["res", "res-product"],
     static_libs: [
         "androidx-constraintlayout_constraintlayout",
         "androidx.slice_slice-builders",