Add OS access interfaces and test impl for wear tethering

Bug: 245971639

Change-Id: I750c2e9bbe8c9a3992ae91d9fea4958bfce60828
diff --git a/staticlibs/testutils/Android.bp b/staticlibs/testutils/Android.bp
index c9b3d07..bcf89b3 100644
--- a/staticlibs/testutils/Android.bp
+++ b/staticlibs/testutils/Android.bp
@@ -36,6 +36,7 @@
         "libnanohttpd",
         "net-tests-utils-host-device-common",
         "net-utils-device-common",
+        "net-utils-device-common-async",
         "net-utils-device-common-netlink",
         "modules-utils-build_system",
     ],