metrics: Fix import paths for headers.

This CL fixes the import path to match the Android format.
The libmetrics headers were also moved to include/metrics to make
exporting headers cleaner.

BUG: 22879597

Change-Id: I67d1ac1746cc3560ae4cbddecf97fa48c9dd1480
diff --git a/metrics/metrics_daemon.cc b/metrics/metrics_daemon.cc
index 880e90c..39af67b 100644
--- a/metrics/metrics_daemon.cc
+++ b/metrics/metrics_daemon.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "metrics/metrics_daemon.h"
+#include "metrics_daemon.h"
 
 #include <fcntl.h>
 #include <inttypes.h>
@@ -11,6 +11,7 @@
 #include <sysexits.h>
 #include <time.h>
 
+#include <base/bind.h>
 #include <base/files/file_path.h>
 #include <base/files/file_util.h>
 #include <base/hash.h>
@@ -20,7 +21,6 @@
 #include <base/strings/string_util.h>
 #include <base/strings/stringprintf.h>
 #include <base/sys_info.h>
-#include <chromeos/dbus/service_constants.h>
 #include <dbus/dbus.h>
 #include <dbus/message.h>
 #include "uploader/upload_service.h"