Move bpf project to system/bpf

The bpf project now have a new project directory in system/bpf instead
of inside netd. The network related bpf library is renamed to
libnetdbpf. Fix the dependency issue in framework to make sure no
regression.

Test: -m CtsNetTestCases -t android.net.cts.TrafficStatsTest
Bug: 112334572
Change-Id: Ibd477bf17d18d516aa520fb1569f4a395ef9abf0

core/jni/com_android_internal_net_NetworkStatsFactory.cpp

@@ -32,8 +32,8 @@
 #include <utils/misc.h>
 
 #include "android-base/unique_fd.h"
-#include "bpf/BpfNetworkStats.h"
 #include "bpf/BpfUtils.h"
+#include "netdbpf/BpfNetworkStats.h"
 
 using android::bpf::hasBpfSupport;
 using android::bpf::parseBpfNetworkStatsDetail;

services/core/jni/com_android_server_net_NetworkStatsService.cpp

@@ -30,8 +30,8 @@
 #include <utils/Log.h>
 
 #include "android-base/unique_fd.h"
-#include "bpf/BpfNetworkStats.h"
 #include "bpf/BpfUtils.h"
+#include "netdbpf/BpfNetworkStats.h"
 
 using android::bpf::Stats;
 using android::bpf::hasBpfSupport;