Move resolver_test.cpp from netd_integration_test to a new resolv_integration_test

1. make resolver_test.cpp as an independent integration test
2. rename libnetd_resolv_test to resolv_unit_test

Test: manually make and run:
      - netd_integration_test
      - resolv_integration_test
      - resolv_unit_test
Test: run runtests.sh, make sure no missing test and get all pass
Test: atest resolv_integration_test
Change-Id: I29a115444d7955c5b6239df80481e29cd3f0e686
diff --git a/tests/Android.bp b/tests/Android.bp
index 5b35fdc..80f5217 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -35,16 +35,10 @@
         ":netd_metrics_aidl",
         "binder_test.cpp",
         "bpf_base_test.cpp",
-        "dns_responder/dns_responder.cpp",
         "netd_test.cpp",
-        "resolver_test.cpp",
         "netlink_listener_test.cpp",
     ],
-    include_dirs: [
-        "system/netd/resolv/include",
-        "system/netd/server",
-        "system/netd/tests/dns_responder",
-    ],
+    include_dirs: ["system/netd/server"],
     shared_libs: [
         "libbase",
         "libbinder",
@@ -60,7 +54,6 @@
     ],
     static_libs: [
         "libcap",
-        "libnetd_test_dnsresponder",
         "libnetd_test_tun_interface",
         "libbpf_android",
         "liblogwrap",