Create prebuilts for wpa_supplicant

Bug: 367468840
Test: launch cuttlefish, atest CtsWifiTestCases
Change-Id: I7e4b350207ed128dc98c7bc1ff8d2299364ca19e
diff --git a/wpa_supplicant/aidl/Android.bp b/wpa_supplicant/aidl/Android.bp
index d523630..8e68e77 100644
--- a/wpa_supplicant/aidl/Android.bp
+++ b/wpa_supplicant/aidl/Android.bp
@@ -83,3 +83,10 @@
         },
     },
 }
+
+prebuilt_etc {
+    name: "android.hardware.wifi.supplicant.xml.prebuilt",
+    src: "android.hardware.wifi.supplicant.xml",
+    relative_install_path: "vintf",
+    installable: false,
+}