Make all the DnsTls headers private to libnetd_resolv

Test: m libnetd_resolv netd
Test: atest resolv_integration_test
Change-Id: Icae95641733abe7fe86b903dd3bcf69b08c83285
diff --git a/resolv/res_send.cpp b/resolv/res_send.cpp
index 21017ac..906269f 100644
--- a/resolv/res_send.cpp
+++ b/resolv/res_send.cpp
@@ -101,9 +101,9 @@
 #include <android-base/logging.h>
 
 #include <netdutils/Slice.h>
-#include "netd_resolv/DnsTlsDispatcher.h"
-#include "netd_resolv/DnsTlsTransport.h"
-#include "netd_resolv/PrivateDnsConfiguration.h"
+#include "DnsTlsDispatcher.h"
+#include "DnsTlsTransport.h"
+#include "PrivateDnsConfiguration.h"
 #include "netd_resolv/resolv.h"
 #include "netd_resolv/stats.h"
 #include "private/android_filesystem_config.h"
@@ -113,6 +113,7 @@
 
 // TODO: use the namespace something like android::netd_resolv for libnetd_resolv
 using namespace android::net;
+using android::netdutils::Slice;
 
 #define VLOG if (!kVerboseLogging) {} else LOG(INFO)
 
@@ -1325,4 +1326,4 @@
     _resolv_populate_res_for_net(res);
     *rcode = NOERROR;
     return res_nsend(res, msg, msgLen, ans, ansLen, rcode, flags);
-}
\ No newline at end of file
+}