Offload HAL update makefiles

Update make files to build Offload HAL binary

Bug: 32842314
Test: Unit tests, check if Wifi Offload HAL service is running
Change-Id: I5da649247fc234fc2555453cf1eac83a14ae496e
diff --git a/wifi/Android.bp b/wifi/Android.bp
index d4e0fda..5b0bf6a 100644
--- a/wifi/Android.bp
+++ b/wifi/Android.bp
@@ -2,5 +2,6 @@
 subdirs = [
     "1.0",
     "1.0/vts/functional",
+    "offload/1.0",
     "supplicant/1.0",
 ]