Fix the multi arch issue of resolv_unit_test.

Test resolv_unit_test fails in MTS, according to the codewiz@,
this test does not need to be multilib. With compile_multi as first
can solve this issue so it's no need to add a duplicated test_config.

Bug: 146684390
Test: mts-tradefed run mts -m resolv_unit_test
Change-Id: I1ada0895f5d055a67d93a9159c54e6b60fd1402e
diff --git a/Android.bp b/Android.bp
index 43a61a5..a830461 100644
--- a/Android.bp
+++ b/Android.bp
@@ -180,7 +180,6 @@
     name: "resolv_unit_test",
     test_suites: ["device-tests", "mts"],
     require_root: true,
-    test_config: "resolv_unit_test_config.xml",
     //TODO:  drop root privileges and make it be an real unit test.
     defaults: ["netd_defaults"],
     srcs: [
@@ -216,13 +215,5 @@
         "server_configurable_flags",
         "stats_proto",
     ],
-    compile_multilib: "both",
-    multilib: {
-        lib32: {
-            suffix: "32",
-        },
-        lib64: {
-            suffix: "64",
-        },
-    },
+    compile_multilib: "first",
 }